We classify each living thing by the different and similar features they possess. Through such classifications, we understand that all things are created for a purpose. They help us to read the book of nature laid before us.

Many species of animals belonging to groups such as one-celled organisms, fish, invertebrates inhabiting the seas, and worms in the earth, are still waiting to be discovered. No one can know for sure what the total number of animal species will be. Time will show whether it will be two million, or three, or even five. The number of animal species identified and named to date is about 1,400,000.

Of these, insects number nearly one million species. The group called Coleoptera, or beetles, have the most species, with about 350,000. The next largest groups are Lepidoptera, or moths and butterflies (about 120,000); Diptera, or flies (120,000); and Hymenoptera, or ants and bees without 110,000 species.

Incredible numbers from the insect world

Many insects serve a vital role for humans. Bees, of course, are a great gift to humanity. They do not only serve us honey, but also have a duty to pollinate flowers, fruits, and vegetables. If it were not for the bee, we would not have many types of fruit we enjoy today, or we would find them with difficulty and at exorbitant prices because they would have to be pollinated artificially. To be able to produce honey as small as one gram, a bee, which covers an approximate distance of 800 km in its lifetime, has to collect nectar from as many as 125,000 flowers. Put differently, in order to make one kilogram of honey, 40,000 bees have to visit 6 million flowers.

The animal with the longest jump

If we asked which could jump longer, a kangaroo or a flea, many would underestimate the flea. Striking findings emerge when we compare distances with body size. While a man can leap a distance of five times his height, the red kangaroo can jump 13.5 meters, which translates as nine times its height. The springbok, a medium-sized antelope living in Africa, can jump 10 times its height, a grasshopper 20 times, a kangaroo mouse 45 times, the northern cricket frog (Acris crepitans) 36 times, and a cat flea (Ctenocephalides felis) 200 times. It is a very special protein called resilin, placed in the muscle fibers in the hind legs, with which the cat flea is enabled to jump such incredible distances.

The animal with the fastest wing beat

Despite their tiny sizes, insects are equipped with most mind-boggling craftsmanship. They have keen senses as well as membrane-like wings that can beat shockingly fast. The common fly beats its wings 180-330 times per second, the worker bee 240-250 times, and the mosquito 278-307 times. Meanwhile, the tiny midge called Forcipomyia beats its wings 1,046 times a second, as calculated in 1953 by Sotavalta, a Polish researcher who used an oscillator for the task. Researchers were startled by how electrical and chemical processes could generate the speed required by contraction and relaxation of muscle fibers.

The eye that can perceive the most subsequent movements

For the perception of movement, the eyes need to record slices of movements, one after another, and send them to the brain. The more the number of movements sent in a second, the faster the perception of the movement. While the brains of some animals can handle a few images at a time, others can process a torrent of them. The fire salamander can perceive and process 5 images a second, a human being and a gecko 20, the black beetle 20-30, the cat 27, the frog 48, the bee 55, the rock pigeon 148, and the dragonfly (Libellula sp.) 300.

The animal with the shortest lifespan

Mayflies (Ephemeroptera) are best known for the fact that they spend 99% of their lives as larvae. They spend this period of youth in water, and then they emerge as adults. The length of their adulthood is normally one day. Some may live 3-4 days, and others die in a few minutes. Adult mayflies cannot nourish or feed because parts of their mouths and digestive system atrophy. They start to fly as soon as they are of age so that they can mate. The males die immediately after fertilization and are followed by females (after they lay eggs). Some can produce one generation, some two, and others many. They store all the air they breathe in a day in their intestine and swell their body, and they use the energy necessary for flying from previous reserves.

The animal colony with the largest population

The nests of social insects such as bees, ants, and termites are like plants that operate in the most incredible order. The perfectly designed division of labor includes such groups as drones, queens, workers, cleaners, babysitters, soldiers, guards, etc. The Bellicositermes have the highest population with three million members. A red wood ant (Formica rufa) nest has 500,000–800,000 members, a leaf-cutter ant (Atta) nest 600,000, a termite nest (Reticulitermes) 100,000, a honey bee hive 40,000–80,000, and a wasp nest (Vespa) 700–1,500.

The biggest insect

Because breathing is carried out by the trachea system in insects, it becomes difficult for oxygen to reach the tips of tubes past a certain distance. That is why insects cannot grow very large. The biggest insect in the world is Phobaeticus chani, a species of stick insect, with its abdomen reaching a size of 35.7 cm (~14 in). Measured from the tips of its legs, it has a length of 56.6 cm (~22 in). The insect with the largest wingspan is the Thysania Agrippina, a butterfly species with a relatively smaller abdomen. The butterfly species with the largest wing surface is Coscinosera hercules with a smaller wingspan (28 cm or 11 in) but a wide surface area of 300 cm².

The keenest sense of smell

Sense of smell plays an important role in many types of behavior such as finding prey, recognizing young, and marking the nest. Smell is perceived when chemical molecules dissolved in the air pass through the nose, which varies according to the species of animal. The more the molecules in the air and the closer the distance, the easier is for the scent to be detected. The most skillful creature in this area is Saturnia pavonia, or the small emperor moth. German researchers proved in an experiment they conducted in 1961 that the male moth could detect a single molecule of a chemical secreted by the female into the air with the help of the chemical receivers placed in its fan-like antenna.

The deadliest animal

Animal documentaries mostly highlight the number of casualties caused by such animals as sharks and the venomous box jellyfish at sea, crocodiles and hippopotamuses in fresh water habitats, lions and elephants in savannahs, bears in forests, and scorpions in deserts. These animals are known to be dangerous because they are easy to see with the naked eye and some can be violent. Yet, the total number of casualties by all these animals combined, we can have a better understanding of the overemphasis. These numbers are especially dwarfed by the death toll (around 2.5 million) caused by the much smaller mosquito (Anopheles sp), which holds the title for the deadliest animal. Malaria, yellow fever, West Nile virus, lymphatic filariasis, and dengue fever, all of which are transmitted by this species of mosquito, pose the most serious health threat in many countries of the world.

The animal with the hugest appetite

The intake of an animal depends on its basal metabolic rate, body temperature (warm-blooded or cold-blooded), and the surface area of its body. The food intake of the anaconda snake amounts to 0.13% of its body weight. It is 1% for the Asian elephant, 2.9% for the lion, 3.5% for the chicken, 3.5% for the little owl, 18% for the goldcrest, 30% for the Eurasian blue tit, and 40% for the rat.  The lesser mole eats as much as its bodyweight (100%), while the hummingbird and pygmy shrew consume twice as much. Much smaller than these animals, mosquitoes suck blood four times their bodyweight. The record, though, is owned by a caterpillar called Anthereaea Polyphemus, which eats plants 86,500 times its bodyweight in 56 days and 1500 times in a single day. If a human baby of 3.5 kilos ate proportionally, it would mean 301 tons of food.

The greatest endurance against G-forces

In an experiment, the click beetle (Elateridae) jumped to a height of 29.8 cm (11.7 in). It was found that it its brain endured a deceleration of 2300g by the time it reached its peak. Even jet pilots can only endure a force of 9-10g, meaning their bodyweight is multiplied by 9 or 10. When the racing driver David Purley crashed into an obstacle at a speed of 174 km, he was subjected to 180 g produced by the deceleration. He survived but and sustained dozens of fractures, a few dislocations, and several obstructions in the heart.

The smallest insect

It was first discovered in Nicaragua in 1999, but because there were not enough samples it was not introduced to the world of science until 2015 when Russian researchers demonstrated 85 samples found in a national park in Columbia. Named featherwing (Scydosella musawasensis), the beetle species won the title of the tiniest animal. The smallest of the samples collected was 0.325 mm; the biggest was 0.352 mm. Having an elongated, oval, yellowish-brown body, the beetle has antennas split into 10 parts. It is incredible that this beetle has a heart, a brain and a stomach despite its size of one third of a millimeter.

Like all omnivorous foods, peppers – both hot and sweet – have been created in unique, wise ways to make them appealing to eat and to help reproduce.

Plants and their fruits are sustenance for herbivores, including humans. They are often brightly colored – be it red, orange, yellow, purple, or green, inviting us to a delicious food. But not all plants are meant to be eaten. Indeed, some plants are designed to be unappetizing, either through look or smell; some even have thorns, or sticky, hairy surfaces to deter us from eating them. Another remarkable way that plants are protected against herbivores is the presence of unique chemicals that induce vomiting and pain, or may be toxic.

Many edible plants need to be eaten – it’s how they spread their seeds. Thus, they produce juicy, tasty skin and sweet-smelling aromas. Why, then, are hot peppers different? Though they are nicely colored and juicy, and sweet smelling, they are also hot, and not terribly pleasant for animals to eat.

A recent study at New Mexico State University’s Chile Pepper Institute determined the hottest chili to be the Trinidad Moruga Scorpion Chili. It was chosen from among 125 varieties. Researchers dried and ground it to powder, to isolate its active compound. This way, they were able to determine that the Trinidad Moruga Scorpion reaches about 1.2 million units on the Scoville heat scale. It is so potent that it could induce sweating and tears, and of course puts the mouth on fire.

Figure 1. Molecular mechanism of TRPV receptor activated by capsaicin. TRPVs are located on the surface of nerve cells where they normally respond to changes in temperature by releasing calcium ions. Those ions signal to intracellular machinery to fire nerve action to inform the brain about increased levels of heat. Capsaicin in hot peppers mimics this system, and thus fools brain to think mouth is hot.

What make hot peppers hot?

Animals are equipped with receptors, like TRPV1 in the mouth’s nerve endings, which sense heat. Hot peppers produce a chemical called capsaicin. Capsaicin binds to and activates TRPV1 receptors; thus we feel a heat similar to a burning sensation. In reality, capsaicin does not actually increase the temperature in the mouth, but instead mimics the same process (Figure 1). Since capsaicin mainly dissolves in oil instead of water, drinking water does not help much to get rid of the burning sensation. Cold water provides only temporary aid. However, the drinking of ayran (a Turkish yogurt drink) relieves hotness by removing capsaicin due to the presence of oil in ayran. Interestingly, although mammals have receptors for capsaicin, scientists have recently discovered that birds don’t.

Capsaicin deters mammalian consumption

It is an interesting phenomenon that peppers are hot but need to be eaten to propagate their seeds in different environments, which is done through the droppings of animals. If this is the case, why are hot peppers made unpleasant with capsaicin? To figure out the wisdom behind this contradiction, Joshua Tewksbury performed a study with a group of mice and birds, and found that birds do not distinguish between sweet and hot peppers in their diet. In this study, both mice and birds ate the same amount when fed with food mixed with sweet peppers. However, mice refused to eat foods mixed with hot peppers, while birds happily ate such food. Moreover, analysis of the droppings of birds and mice showed that the seeds passed through the bird’s digestion systems were intact and fully fertile and could germinate, while seeds eaten by mice were either crushed or semi digested so that they were not fertile. Thus, the role of capsaicin in hot peppers is to deter mammals that destroy their seeds while not disturbing birds. This is a great example of ingenious interdependence.

Capsaicin as antifungal agent of peppers

Figure 2. Capsaicin is not only protective against mammals but also fungus contaminations. A) Insects make peppers prone to fungus contamination by causing harm. B) Healthy pepper C) A pepper with fungal contamination. Modified Image from Tewksbury lab.

The infinite wisdom of capsaicin protects peppers against fungus as well. Another study by Tewksbury showed that hot peppers are relatively protected against fungal infections. Tewksbury demonstrated that increased doses of capsaicin inhibit the growth of fungus. This finding is in parallel with lower fungus growth in hot peppers compared to sweet peppers.

But what about insects? How could peppers be protected from insects?

Adaptations against insects

Interestingly, the skins of hot and sweet peppers have different levels of thickness. It has been suggested that this gives an advantage to sweet peppers. Furthermore, this protective layer is made of lignin, which is made of the same material as capsaicin and helps to protect from other threats. This allows peppers to adapt to many different environments. For instance, in the presence of fungal contamination, a pepper might be able to produce more capsaicin and decrease lignin production, or vice versa.

Why do we like to eat hot peppers then?

Humans differ from mammals in their love of hot peppers. There are different explanations why we like to eat hot peppers, despite them being painful. Some experts assert that hot peppers are good for our health by lowering blood pressure, having antimicrobial effects, and increasing salivation thus making a boring diet fun. On the other hand, some experts approach it from the perspective of human emotions and argue that we are actually after the pain produced by hot peppers. In addition, there are some studies suggesting that capsaicin could also suppress other pains.

Hot pepper or capsaicin as pain suppressor

Capsaicin in hot peppers could be used as a pain suppressor, as some studies suggested. A study using mice lacking TRPV1 heat receptors showed that the increased long term activation of TRPV1 by capsaicin could relieve pain following the accumulation of high doses of Ca2+ in the cells. This is accomplished by the suppression of both cellular activities and the transmission of pain through nerves.

Hot peppers are hot and we love them. It seems like we will continue consuming them. As every other art of creation, hot or sweet peppers are likely to have many more levels of wisdom awaiting us to discover.

References

• Tewksbury Lab. Retrieved from: http://faculty.washington.edu/tewksjj/res_pai.html on 18.2.2012.
• Yalgın. Ç. 2012. Acı biberler niye acı? (Why Are Peppers Hot?) Açık Bilim. Retrieved from: http://www.acikbilim.com on 18.2.2012.
• Zivkovic, B. 2006. Hot peppers – Why are they hot? A Blog Around The Clock.

There are lots of interesting examples of how plants communicate with insects. For instance, in self-defense against insects eating its leaves, a plant emits a volatile chemical that signals other insects, who are predators of those insects eating the plant. A byproduct of such insect communication may allow plants to signal danger to other extremely close, downwind plants. Professor of Entomology, Richard Karban and other researchers from the University of California showed that a cut sagebrush “told” nearby, downwind wild tobacco plants about its injury, and the tobacco plants apparently responded to protect themselves from damage. Over three seasons, researchers clipped leaves of sagebrush plants to mimic insects eating their leaves. The cut sagebrush released volatile chemicals (methyl jasmonate), which the wind carried to nearby downwind plants. The tobacco plants apparently sensed the chemicals-at least the tobacco plants increased production of a defensive agent-that caused their leaves to taste bad to insects. These downwind tobacco plants experienced less than half the leaf damage from grasshoppers and cutworms than control plants (Anon.). In one case study an acacia tree responded to browsing, or being beaten with a stick, by increasing the levels of tannin in its leaves within minutes. Amazingly, the tannin levels then rise in neighboring trees, and, due to its bitter taste, repel the browsers before they can do any further damage (Jacob 2001; Anon.).

What’s more is that plants can also talk to mammals. A study done by Professor Steven Johnson and his research team from the University of KwaZulu-Natal, South Africa, demonstrated how ground-dwelling mammal pollinators are attracted by a rare parasitic plant’s unique “perfume.” This specific floral aroma is comprised of over 30 compounds, especially ketones, fatty-acid derivatives, mono- and sesquiterpenoids. The three most abundant scent chemicals were 1-hexen-3-one, 3-hexanone, and ethyl butyrate. When the impact of these chemicals was tested on mice, it turned out that mice, like humans, find 3-hexanone to have a pleasant smell. The molecule is routinely used in artificial flavoring to produce a sweet fruity grape-like flavor. In addition, 3-hexanone has also been found in some bat-pollinated flowers, so it may be a general mammal attractant. Remarkably, scent cues are particularly important to plants pollinated by small ground-dwelling mammals because these animals are usually around at night when visual cues are less effective (Johnson et al. 2011; Anon.).

In addition to pests, plants have to deal with numerous microbial pathogens such as bacteria, fungi and oomycetes, and viruses in the natural environment. A proper response to pathogens can lead to resistance mechanisms that enable plants to survive. Plants can recognize potential pathogens by detecting pathogen-associated molecular patterns (PAMPs). This recognition activates a defense mechanism. A well-organized communication between the pathogen-invaded plant tissues and non-invaded ones is essential for the timely manifestation of defense mechanisms that limit the systemic spread of pathogens (Shah 2009). Salicylic acid, an important mobile signal, is transported from infected tissue to the rest of the plant body. It activates the systemic acquired resistance, which is a “whole-plant” resistance response that occurs following an earlier localized exposure to a pathogen. Plants not only communicate within themselves about a microbial invasion, they also talk to one another. For example, Tobacco plants warn each other against tobacco mosaic virus attack by releasing methyl salicylate, which is then converted to the protective salicylic acid in uninfected plants (Jacob 2001).

In contrast to harmful pathogenic interactions, there are also symbiotic, advantageous interactions between some microorganisms and plants. Establishment of such a beneficial symbiosis (which literally means “living together” in Greek) is complex. For successful infections, a molecular dialogue between partners is essential (Vadassery and Oelmüller 2009). Among these kinds of interactions, legume-Rhizobium symbiosis is of particular importance in agriculture, because by forming the symbiosis, atmospheric nitrogen can be used to sustain the growth of legume crops, such as soybean, pea, and bean, which occupy 12% to 15% of the land that can be used for growing crops throughout the world (Sugiyama, Shitan, and Yazaki 2007). Rhizobia are soil bacteria that fix nitrogen (diazotrophs) after becoming established inside root nodules of legumes such as alfalfa, clover, peas, beans, lentils, lupins, mesquite, carob, soy, and peanut.

Rhizobia require a plant host, since they cannot independently fix nitrogen (Anon.). Plant roots secrete signaling molecules (e.g. flavonoids) to attract Rhizobia. When Rhizobia sense these chemicals, they colonize around root tissues of the host legume plant. So, the rhizobial infection in legumes is an invasion by invitation (Murray 2011). The attached rhizobia secrete Nod factors, which are perceived by the plant. This initiates a series of events that leads to the formation of nodule, where Rhizobia fix nitrogen. Thus, Rhizobia make legume independent of soil nitrogen and the legume supplies nutrients to the bacteria. In addition, the legume plant supplies one critical component of nitrogenase, which is the key enzyme for fixing nitrogen. It all happens because the plant can talk to the bacteria.

The plant has many interests in being colonized by mycorrhizal fungi. Apart from providing nutrients such as phosphorus and nitrogen, the fungi protect plants from diseases, parasites, and other stresses. Plants even grow as much as 40% more when colonized. In laboratory experiments, carrots that were colonized grew 20 times more than the carrots that were not! In fact, they are such close “friends” that the fungus cannot live without a plant, and between 80-90% of all plants on earth are somehow associated with mycorrhizal fungi. The origin of this incredible friendship is communication (Montréal 2012).

As a result, plants can talk to microorganisms, pests, and mammals, but do they communicate with people? Are they intelligent creatures who can communicate with us? In 1848, Dr. Gustav Theodor Fechner, a German professor, suggested that plants are capable of emotions and that one could promote healthy growth with talk, attention, and affection. An Indian scientist, Sir Jagdish Chandra Bose, conducted experiments on plants in 1900. Bose found that plants grew more quickly amidst pleasant music and more slowly amidst loud noise or harsh sounds (Sir Patrick Geddes and Geddes 1920).

Moreover, according to Royal Horticultural Society, talking to plants helps them grow, especially if the one talking to the plant is a woman. Even though there are lots of divisive experiments done with plants to understand if they can talk to human beings, there is no serious finding about this subject yet. Even if, plant biologists do not currently know how to talk to plants, they strive to comprehend how plants communicate with other organisms in order to use this new and exciting language for improving the resistance of plants against pests or pathogens. Instead of using chemical pesticides, genetically engineered plant defense and communication pathways in crops are a preferred avenue.

Communication of plants with other organisms is such a complex problem. Plants can have a network with so many different creatures. They pass on information to each other or to other organisms that speak other languages. How did they obtain these amazing communication skills? Even the most advanced creatures, human beings, experience problems in communication, how can plants have robust communication systems in a heterogeneous environment?

The next time you hear a strange rustling among your garden plants, maintain distance. They might be having an argument. Plants also talk and they respond to attacks like we do. So, be careful and do not hurt plants as they might even curse or scream to you (Anon.).

Safiye Arslan is a research fellow in the area of molecular biology in Nevada.

References

• Adler, Frederick R. 2011. Plant signalling: the opportunities and dangers of chemical communication. Biology Letters. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=3061173tool=pmcentrez&rendertype=abstract.
• Anon. Do plants talk? What are the chances it’s a boy? – USATODAY.com. http://www.usatoday.com/tech/columnist/aprilholladay/2006-07-24-plant-talk-baby-boys_x.htm.
• Anon. jacobson’s organ and the remarkable nature of smell. http://books.google.com/books/about/Jacobson_s_Organ_and_the_Remarkable_Natu.html?id=liKKQgAACAAJ.
• Anon. BBC – Earth News – “Perfumed” parasitic plant lures in pollinating mammals. http://news.bbc.co.uk/earth/hi/earth_news/newsid_9376000/9376474.stm.
• Anon. What is Rhizobia. http://www.bionewsonline.com/y/what_is_rhizobia.htm.
• Anon. Biotechnology: Plantlinguistic: – “Plants Communicate With Each Other.” http://bioinformations4all.blogspot.com/2009/08/plantlinguistic-plants-communicate-with.html.
• Jacob, Tim. 2001. “The science and myths of smell.” EMBO Reports 2 (10): 880. http://www.nature.com/embor/journal/v2/n10/full/embor301.html.
• Johnson, Steven D, Priscilla M Burgoyne, Lawrence D Harder, Stefan Dötterl, and Proc R Soc. 2011. “Mammal pollinators lured by the scent of a parasitic plant Subject collections Mammal pollinators lured by the scent of a parasitic plant.” Society 278 (January): 2303-10. doi:10.1098/rspb.2010.2175. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=3119003&tool=pmcentrez&rendertype=abstract.
• Montréal, Jardin botanique de. 2012. “Chatting with a plant’s best friend – Science +” (June 3). http://www.aucoeurdelarbre.ca/en/thematics-texts/thematics-texts-details.php?id=8.
• Murray, Jeremy D. 2011. “Invasion by invitation: rhizobial infection in legumes.” Molecular plantmicrobe interactions MPMI 24 (6): 631-639. http://www.ncbi.nlm.nih.gov/pubmed/21542766.
• Shah, Jyoti. 2009. “Plants under attack: systemic signals in defence.” Current Opinion in Plant Biology 12 (4): 459-464. http://www.ncbi.nlm.nih.gov/pubmed/19608451.
• Sir Patrick Geddes, and Sir Patrick Geddes. 1920. The life and work of Sir Jagadis C. Bose. Longmans, Green. http://books.google.com/books?id=EPtCAAAAIAAJ&pg=PA97&q=”continuous”#v=twopage.
• Sugiyama, Akifumi, Nobukazu Shitan, and Kazufumi Yazaki. 2007. “Involvement of a soybean ATP-binding cassette-type transporter in the secretion of genistein, a signal flavonoid in legume-Rhizobium symbiosis.” Plant physiology 144 (4) (August): 2000-8. doi:10.1104/pp.107.096727. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1949875&tool=pmcentrez&rendertype=abstract.
• Vadassery, Jyothilakshmi, and Ralf Oelmüller. 2009. “Calcium signaling in pathogenic and beneficial plant microbe interactions: what can we learn from the interaction between Piriformospora indica and Arabidopsis thaliana.” Plant signaling & behavior 4 (11) (November): 1024-7. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2819509&tool=pmcentrez&rendertype=abstract.

Many important characteristics exist in seeds. Seeds are equipped with all the necessary information about the branches and leaves of the plant which they will become, as well as the number and shape of these leaves. Within the seed is programmed the color, fineness or thickness of the bark, the number and width of the tubes that carry food and water, whether the plant will bear fruit or not, and if it bears fruit, the taste, smell, shape and color of this fruit. Even information about how the plant will react to a negative condition in the environment during normal development is registered in this program. For example, a plant that would normally develop under ideal climatic conditions is programmed to produce seeds in a short term to protect reproduction under unsuitable conditions like drought and great heat. God is He Who splits the seed-grain and the fruit-stone (so that they germinate by His command). He brings forth the living from the dead, and He is One Who brings forth the dead from the living; such is God: how then are you turned away from the truth and make false claims? (An’am 6:95)

If we consider the growth process of the plant from a seed that is equipped with perfect information, we can see that once the appropriate conditions have been created the seed first germinates and then the body and leaves are formed on this stem. When the time is right, flowers form in keeping with the divine order. The flowers that later form the fruit and seeds for further plants are either brought together with their own pollen (cleistogamy or self-pollenization) or with other pollen from another plant of the same type (cross-pollination) in a perfectly organized system. Self-pollenization occurs either before the flower opens or after the pollen has developed. Because the pistil and stamens of some plants are hidden by some other parts of the plant, it is difficult for the pollen to reach here, so the plant obeys what is ordered and self-pollinates.

In cross-pollination, plants use the pollen from another plant of their own species. Pollen transportation occurs with the help of the wind, rain or insects that visit flowers.

The flowers of many plants that are pollinated by the wind and rain are very modest in appearance, but they have been created in a way to produce pollen in abundance. Although most of the pollen that is carried away by the wind and rain are destroyed, this lost pollen organically enriches the soil and at least some of this pollen will find a flower to pollinate. Our Lord has bestowed those flowers that are pollinated by insects with various colors and shapes to attract these visitors. During pollination, the pollen of flowers that have less pollen than the self-pollinating flowers are carried by bees and other insects, whose legs, wings, and antennae have been created specifically for this task, as they have been inspired (Nahl 16:68–69). Nectar and pollen are the reward for these insects which provide pollination.

Bees are the most important group among the insects that carry out the task of pollination. When bees are mentioned, most people think of the honeybee, but bumblebees also serve mankind. In addition to the products they offer to us, bees are indispensable for their contributions to plant reproduction.

Bees store the nectar they have sucked from the flowers in a “honey stomach” and then empty this nectar into a honeycomb as honey. The bees legs, granted to them by the Creator, allows them in their duty of collecting pollen. The back legs of the bees are different from that of all other insects. The long hairs that are aligned on these stocky legs act almost like a basket to collect the pollen.

Of the 82 plant types that meet 90% of the human food needs around the world, 63 (77%) are pollinated by bees; without bees it would be impossible for these plants to produce seed. Bees are absolutely necessary for the formation of seeds in plants that we eat, like apples, pears, peaches, apricots, cherries, melons, watermelons or pumpkins, or indeed in those used in industry, like sunflowers, safflowers, rapeseed, cotton, or sugar beets, or those used for feeding livestock, like clover, sainfoin, red clover, or vetch. This task carried out by bee pollination every year throughout the world is much more important than the production of honey. Moreover, bees make life possible for animals from thousands of species who use these plants as food or shelter. We should not forget the connection Einstein drew between the disappearance of the bees from the ecosystem and Doomsday.

Another vital mission entrusted to bees is the prevention of erosion. Plants that need the pollination of bees, like members of the Asteraceae, Boraginaceae, Brassicaceae, Campanulaceae, Compositae and Fabaceae families, are widespread in areas were there are serious threats of erosion. Similarly, feed crops, which are very important in feeding livestock and preserving the ecological balance, also need insects for pollination. In plants like clover, the upper side of the flower organs is covered by a membrane; in these plants, bees break this membrane to get at the pollen; if it were not for bees, the pollen would remain trapped.

It is by Divine guidance that bees take nectar and pollen from the same type of plants all day. Even if there are other plants which contain more nectar and pollen, bees only stop at the type of flower that it first visited. The fact that bees collect nectar and pollen from the same type of plants all day long shows that this is not something they do randomly.

Like many other living things in the universe bees are in service to mankind, operating under the rules set by the Lord of the Worlds. However, activities that are carried out without investigating the meaning of the universe and the wisdom behind the creation of the living things, such as unplanned industrialization, which in turn has lead to an increase in air pollution, or the careless use of chemical materials, are the reason for a decrease in the population of bees, day by day. Never mind the wars and fires started by mankind, any venture that may cause the bees to disappear could lead to the destruction of mankind; if the bees become extinct, mankind will face many disasters, like erosion, desertification and the extinction of plants which are food for us and for the animals we raise.

There is no similarity between the systems through which insects produce or receive sounds. Furthermore, even the frequencies of the sounds they produce or hear may not be the same. The wisdom behind this might be that the receptors of some insects are devised in a way that will enable them to detect sounds produced by their enemies. Moths can be given as a typical example of this. They can detect sounds between 1,000-140,000 Hz. Their sensitivity is best between frequencies of 20,000-40,000 Hz, but interestingly, most moths do not have any organs to produce sounds at these frequencies. In other words, moths do not seem to use their tympanal organs in order to communicate with one another. Discovering the real function of the tympanal organ of the moths has taken researchers quite a long time.

The mysterious relation

Every being in nature is created to assume a role in the ecological balance and no creature has been equipped with a useless organ. Researchers have discovered that the tympanal organ plays an important role in defense. Moths spend the day resting in corners and only become active after sunset. Researchers have come to the conclusion that they are not searching for food, since the nutrition they need is stored in their bodies during the larva stage. Thanks to this blessing, moths do not spend their short life span in search of food. The aim of their night flights is reproduction.

The essential duty of moths is to find the plants where they will lay their eggs and on which their larvae will feed. As slow moving animals, it is almost impossible for the moth larvae to go and find their own food. As all creatures are provided in accordance with their need, these helpless larvae are born on their food. Another amazing fact about their nutrition is that the moth larvae eat their own protein-rich eggshells before eating leaves. Research has shown that those larvae which eat their eggshells are more resistant to environmental conditions.

As the moths try to continue their species by laying their eggs in the darkness, some other creatures try to continue their own existence by feeding on the moths. Bats eat insects and are also active at night. As is well known, bats fly comfortably in the dark thanks to the radar system they have been equipped with. This innate system is perfectly devised to enable bats to pinpoint a tiny insect flying through the darkness, and moths are a prey that is easily spotted by bats. The astonishing fact is that the moths’ sensitivity to the sound waves is perfect for picking up the sounds emitted by bats. The moths are able not only to detect the bats, but also to judge their distance from the frequency of the waves. If the distance is greater than 30 meters, the moth leaves the area immediately. If the bat is closer however, the moth takes a zigzag course or tries to avoid danger by plunging down and staying still.

The balance here is so perfect that while bats are skilled enough hunters to obtain provision, the moths are good defenders and are able to continue their existence. Both species fulfill their roles in balance with creation. Some bats are able to catch some moths, but there is no excess on either side. Nothing is left to blind chance in nature; not only did the Creator equip the bat with a perfect radar system, He did not leave the moth helpless but granted them perfect receptors to rescue themselves from bats. If it were not for the Power that established the mysterious balances in the universe, how would a bat find its way through the darkness and how would moths be protected from extinction?

Every different type of moth which forms another ring in the chain of food in nature lays its eggs on different plants. If moths did not feed on certain fast-growing plants and if their growth is not kept under control, these plants would invade the space of other plants and wipe them out. The moths and other creatures that feed on plants ensure that no one plant is allowed to upset the balance of the chain of nutrition. Similarly, the perfect balance established between bats and moths prove that nothing in this universe is left on its own. When confronted by the perfect order in nature, one cannot help but think about the verse:

You do not see any fault or incongruity in the creation of the All-Merciful. Look yet again: can you see any rifts?

Then look again and yet again, (and however often you do so, with whatever instruments to aid your looking) your sight will fall back to you dazzled (by the splendor of God’s creation), and awed and weakened (being unable to discern any flaw to support any excuse for claiming that there could be any sharing in the dominion of the universe). (Mulk 67:3)

Solar radiation is unpolarized before entering the earth’s atmosphere. Unpolarized light is a mixture of photons having randomly oriented electric fields. According to the simplest theory (Rayleigh), when unpolarized sunlight scatters from atmospheric constituents (gases, aerosol particles, water droplets, ice crystals), it becomes partially polarized, depending on the scattering angle – the angle between the incoming (direct solar) and outgoing (skylight) rays. Unpolarized light can also undergo polarization by reflection off of nonmetallic surfaces such as asphalt roadways, soils, racks, snow fields and water. Therefore, there is an abundance of polarized light in natural environments in various forms. Recently, it has become apparent that animals can take advantage of these rich sources of information in the underwater world, on the water surface, and in the terrestrial habitat that are of celestial polarization patterns. They utilize this polarized light prevailing in their visual worlds in various ways associated with their behavioral tasks like navigation, communication, mate recognition, eggs laying, detection of water surfaces, enhancement of visual power (similar to colors), or perhaps even camouflage.

The skylight compass

The best understood use of polarization is the skylight compass of insects. The orientation of the electric field changes with the position of the sun. This can make the sun as a compass usable even when the sun is obscured. In 1949, Nobel laureate Karl von Frisch discovered that when the sun is not visible, honey bees can orient their flights and communication dances by means of the extensive patterns of polarized ultraviolet (UV) skylight¹. For clear sky, these patterns are quite regular and depend so strongly on the position of the sun. It is amazing to see how these little hard-working creatures come programmed to use them to calculate the sun’s location.

Since von Frisch’s pioneering work, several other researchers investigated polarization vision and found that the polarization pattern of the sky offers many other insect species (desert ants, dung beetles, field crickets, and house flies) a reference for visual compass orientation². For example, desert ants were shown to make long and tortuous foraging walks, but use the sky polarization pattern to return to their nest on a straight line³. They are able to continuously compute their present location from their past trajectory and, as a consequence, to return to the starting point by choosing the direct route rather than retracing its outbound trajectory.Moreover, interestingly enough, researchers discovered that one species of dung beetles navigate by using million-time dimmer polarization patterns of moonlight. Dung beetles use it as an orientation guide to leave their food source in a straight line to avoid aggressive fights⁴. To find out how the beetles are able to use the polarized light of the moon to navigate, researchers observed the beetles under the night sky. On nights when the moon was visually clear, the beetles continued to forage and roll their dung balls in a straight line. On moonless or cloudy nights the beetles could not maintain a straight path.

Reflections from water

In nature, important reflections come from water where the polarization distinguishes between water and other reflective surfaces. Horizontally polarized UV light reflected from the surface of water is the main optical cue for habitat finding by insects living in, on, or near water. Weak UV light emitted by a horizontal surface below flying backswimmers can cause the animals to turn their flight paths vertically downward, bringing them to the horizontal surface⁶. Polarization sensitivity has, likewise, been demonstrated in crustaceans, like in the shore-living water flea Daphnia pulex. These animals were shown to swim toward polarized light, which in nature would lead them away from the shore towards deeper water⁷.

Human activity can have overwhelming effects on the natural environment and man-made objects, such as crude or waste oil surfaces, asphalt roads, glass surfaces, or plastic sheets used in agriculture are unfortunately more attractive to water-seeking polarotactic insects than the water surface itself. This effect can be very dangerous for polarotactic insects as these objects function as insect traps. Researchers have observed that every year, in May and June, swarms of mayflies mate, not above lakes and rivers, but above dry asphalt roads and lay their eggs in vain on dry asphalt roads or car-bodies. The horizontally polarized light from these surfaces mimics a highly polarized water surface.⁸ .

Ocean animals

For many ocean animals, sensing polarization may be even more important than sensing color. One possible use for polarization in the ocean (and elsewhere) is signaling: communicating with neighbors, rivals, and potential partners. Recent discoveries have shown that stomatopods (Mantis shrimps), a sort of shrimp found on reefs around the world, use special body areas to communicate with polarized light (Fig.6)⁹. Polarized light can also be used to ‘break the camouflage’ of aquatic organisms because, although from most viewing angles they match the color of the water behind them, the nature of the polarization is quite different. Researchers have found that transparency of aquatic organism to avoid detection can be broken with the help of polarization sensitivity¹⁰. In their experiment, they observed that squid detect zooplankton prey under partially linearly polarized lighting 70% greater than those achieved under non-polarized illumination.

In summary, polarization is central to most of the animals’ lives. It is abundant in the nature in various forms. Here, we have given only couple of examples of ways of various animals’ exploitation of polarized-light information. It seems, as researches continue, that the already long list of animals utilizing polarized light will get even longer as we learn more about it. Yet, even these mentioned examples above are enough to help us realize how perfectly these small animals have been created, and how well they are taken care of in their daily lives when they navigate, communicate, recognize a mate, lay eggs, detect water surfaces, or perhaps even break camouflage. Here, it seems necessary to observe that “The tiny body of a fly is connected with most of the elements and causes in the universe; indeed, it is a summary of them. If it is not attributed to the Pre-Eternal and All-Powerful One, it is necessary for those material causes to be themselves present in the immediate vicinity of the fly; rather, for them all to enter into its tiny body; and even for them to enter each of the cells of its eyes, which are minute samples of its body.” We refer the interested reader to Said Nursi’s reputable article of “A Treatise on Nature”¹³ and conclude with his aphorism: “He who created the eye of the mosquito is the one who created the sun.”

Many of you are frightened of us. You have even invented a disease called “Arachnophobia” (fear of spider). On the contrary, I do not inflict any harm on you, but rather help tidy up nature by catching harmful insects in my web. Particularly, when I remember the honorable task one of my ancestors took part in, my eyes get misty with emotion: In order to save the Prophet Muhammad, peace be upon him, the Pride of the Universe and Humanity, from his enemies, our Lord commanded one of our ancestors to quickly make a web over the entrance of the cave they were hiding in, and this made the infidels stop searching for him there. This honor is enough for us until the Day of Judgment. And please, at least, remember this historical event and stop killing us wherever you see us.

Many of you mistake us for insects. We, the spiders, are different from the insects. The easiest way to differentiate us is to count the number of legs and the parts of our bodies. Insects have six legs, whereas we have eight; their bodies are made of three main parts, while our bodies consist of two parts, one being the head. Moreover, we are different with respect to the sizes and numbers of our eyes. The insects usually have two large compound eyes, whereas we have eight small simple eyes (the simplicity here does not mean ordinary, or lacking in art, it means uncomplicated, plain!).

Those who-in order to reject our Lord-seek a way out through the dead ends of the theory of evolution are stunned when they see the delicate embroidery art in my body and the trap strategy in my magnificent webs. Since they know that we do not have intelligence or conscience, they, helplessly, take refuge in a term called instinct. You can resemble these thinkers to the flies that fall into my trap; the more they struggle through reasoning, basing their theories on nature, or causality, or coincidence, the more entangled they become. In order to deny God, they give credit to some imaginative alternatives for the artwork that has been bestowed upon spiders and thus deceive themselves.

We can live in all continents, except Antarctica, and can survive in many climatic conditions, from deserts to rainforests. The reason that we are more common on oceanic islands than on continents is the special threads we use in our nets. We can use this thread like a parachute and can travel on the wind to far away lands.

One of our most important attributes, the merit of which is so valuable that it is mentioned in the Qur’an, is our silk thread gland that produces thread in various qualities. We use this silk-like substance, which is discharged from conical nipples on our abdomen, for numerous purposes. Most of us are granted with at least two kinds of silk glands, with different structures and secretions. And we are given the knowledge to use these threads for different tasks appropriate to their chemical composition. Since the flexibility, durability, thickness and adhesiveness of each type of thread is different, we use the right type for each task. We use some types of thread to build a web to trap prey, others for furnishing inside our homes, and still others to protect our egg or sperm sacks.

Although everyone knows about our thread, the bio-chemical process that takes place during its production is yet to be completely understood. Our thread, despite being thinner than one thousandth of a millimeter, is five times stronger than a steel string of the same thickness. And it can be stretched up to four times its length. Moreover, it is so light that, despite the great length required to go around the world, such a thread would only weigh 320 grams. My web occupies a large space in comparison to my size; but this appearance is deceptive. My real home is a small spot in the middle; the rest is a trap set up for flies. Now, despite being such a wonderful material, the Holy Qur’an, in the chapter named after me, states that “ The parable of those who take to them other than God for guardians is like a spider: it has made for itself a house, and surely the frailest of houses is the spider’s house. If they only knew this!” (Ankabut 29:41). Have you ever wonder about the inner meaning of this verse? If you have, you can see that it describes my house as being feeble and flimsy, but not the thread that made the house. That means, no matter how excellent is the material you have, if you do not use it in the right place, it is useless. My thread and my house that I build are adequate for me, working as traps for my prey. You might waste the highest quality materials if you use them to construct a building with poor foundations. That is to say, if a human being, equipped with the most wonderful qualities, chooses an invalid fallacious god for themselves, they waste the equipment bestowed upon them, such as intelligence, comprehension and conscience. What is worse, when they adopt a deity other than God, whatever they accomplish in terms of excellent scientific studies, discoveries, or inventions will all be wasted. The arguments of those who deny God might seem sound, but in reality they are fallacies, causing those who are not using their innate capabilities to fall into their traps. Of course, a miraculous book like the Qur’an can be read and understood from the perspectives of other sciences and thus can be understood in a variety of ways. Mine is just one. …

The production of my silk, which is stronger than either synthetic or natural fiber, is similar in part to the production process carried out in factories that manufacture thread. The protein called keratin that I use in silk production is a very common substance, found in human fingernails and hair, as well as in bird feathers, in horn, and in the scales of snakes. Even though the same amino acid is used by these creatures, our Lord, the Creator of all, has the knowledge and the omnipotence to turn the same protein found in your fingernail into silk in my glands.

The liquid silk material, discharged like a protein soup, passes through the ducts of a gland where the liquid is absorbed very rapidly and is then turned into acid by other cells via hydrogen atoms before being spurted out as silk. Once the densified proteins enter the acid pool they form links with one another and turn into thread. The bio-chemical reactions that take place in this process, which I have only explained very basically, vary, depending on the types of thread produced in the different glands; by using different processes different types of thread are produced.

My Lord, Whose mercy is endless, Who gave me all the things that I need to survive down to the smallest detail, has granted me six different manufacturing chambers. In each chamber the chemical substances, prepared as different formulas, are mixed in different proportions to suit my needs; in addition, the caliber of the orifices from which they are spurted and the pressure of the pumps are adjusted to the most appropriate levels to produce thread with different characteristics. Neither my knowledge, nor my ability is enough to comprehend the settings in the silk producing nipples located in my stomach. Nevertheless, the threads that I use for hunting are sticky, while others, by which I return to my home with my prey, are stronger and more flexible. Moreover, the other kinds of thread which I use to wrap my prey are straight and have the quality of becoming harder when movement occurs, while the other threads that I use for my egg sacks have an antibiotic to protect against germs, the ones that I use to go up and down are slippery, and finally the ones I use to lay the foundation of my house are thicker while the ones that I place within the nest are thinner. With graceful leg motions I bring all these threads to the right place and secure them there. I straighten some thread with a comb in my foot. The threads are coated with a liquid substance that protects against fractions in case of exposure to pressure.

A creature that is as small and helpless as I am would need to understand the order of the protein atom used, as well as the properties of pressure in order to protect against fractions, and comprehend the structure of the coating material and many other physio-chemical principles in order to produce these threads that have such excellent qualities. Since that is not the case (I do not have any such knowledge) and as the creation cannot be explained via some unconscious terms such as evolution, mutation, or natural selection, my Creator, the creator of all that I do, is Allah. Plastic surgeons have just started to use some types of spider threads in delicate operations on tendons and joints.

Although I do not have any architectural or engineering training that would help me to calculate where I have to secure my threads or to understand the angles between them, with Divine Guidance I am able to perform these tasks properly. Since I live mostly on insects, I am a very useful animal for you; by catching and destroying many insects I play an important role in the ecological balance. Otherwise, these insects would be overwhelming, not to mention the harm they cause to crops. In addition to this there are some interesting species of ours, which live on fish or even bird.

There are approximately thirty-five thousand species of spiders; of this only five hundred can be considered to be dangerous to humans. Even though all of us have poison glands, if we bite a human in general this only causes an itch. We do not deliberately come and bite humans. Even the most poisonous of us all, the black widow (Latrodectus mactans) is rarely fatal for human beings. This species, which builds a large web with a conical center, can hide around 250-750 eggs, wrapping them up with a silk cover. The females are three centimeters in size, while the males are only about one-fourth the size of the females. Once the females receive the sperm, they eat their males instantly before they can escape. Unlike many of us, the Tarantula (Lycosa tarentula), a spider that measures 2.5 centimeters and which belongs to the wolf spider family that is found in Europe, does not make webs; rather they catch their prey by chasing. They have strong venom as well, but contrary to the common exaggeration, this venom is not fatal. There is another species of tarantula in South America, but this spider belongs to a totally different family, the Theraphosa. The size of the main body of this spider is about 9-10 centimeters, and the distance between the legs is 25-30 centimeters. This large and hairy kind of spider is active at night. Some of them live in holes they have dug in the ground, while others build nests on trees. Even though they can be classified as harmless, their bites hurt. They kill small frogs, lizards, and even birds.

Most spiders live alone. A few of us make houses next to each other, and hunt together. Our hunting techniques are various. The Bolas spider (Cladomelea longipes) has incredible techniques for preparing and throwing bolas. Even though their sense of sight is poor, this species can feel the vibration of flying pigeons and they diffuse a special odor to attract their prey; once the prey has come close, the spider catches it with a sudden attack, paralyzing it with its poisonous bite and then wrapping it in special silk. This special silk has a quality that allows it to keep the wrapped prey fresh; thus, the food, which cannot be consumed in one meal, can be safely stored.

Species that live in the desert dig tunnels in the sand to protect themselves from the dreadful heat, and discharge a special excretion to stick the sand together. They also insulate the interior of the tunnel with silk threads to protect themselves from the heat outside. They make a special silk lid to the entrance of the tunnel and camouflage it with some sand. Then, by stretching their thin thread between some rocks and sticks nearby, they wait for their food. Since the daytime is so hot, they prey at night, waiting for insects to vibrate the threads they have placed.

There are other species, for example, the water spiders (Argyroneta aquatica). This species lives in the water and makes their nests in an air bubble on the water, from time to time traveling up to the surface and restocking the air under their stomach to pump it into their home underwater. Another species, called Dolomedes fimbriatus has legs that enables them to walk on the water and to live on fish. As it is the case with all kinds of Arthropoda (exoskeletal animals), we need to change our skins when we grow. Once the outer skeleton, made of ketone becomes hard, it impedes our growth. Because of that, from time to time, we shed this skin, and grow rapidly while our new skin is soft. Moreover, the legs, which are cut off due to various reasons, are renewed with the grace of God.

I could tell a lot more about my friends, but I think this is enough. I hope that from now on no one will attribute our artful of creation and behavior to evolution or coincidence. In fact, I do not expect such a thing from human beings, who have intelligence, conscience, and comprehension.

Termites, one of the most common insects in the ecosystem, have very interesting specifications and social behaviors. These insects are of interest due to their ability to digest cellulose and to recycle organic foods found in rotten leaves, dead wood or wood chips. Although they are considered by some to be harmful to the economy-in the USA alone 600 million dollars every year-because they eat wood, in truth they bring about more benefit than harm. As a result of the activities of these insects, our forests are able to respire and regenerate. Termites break down old, decayed, and fallen trees, digesting them and thus helping nature to renew with a continuous circulation of vital substances. Despite the depth of information that is known about the ecological and economical importance of termites, only a little is known about their biological structure and behavior. Two characteristic features of these insects are that they live in social colonies and that they are very susceptible to infections, as they build their nests in soil or rotten wood. Since their environment is covered with damp and warm earth, they are also surrounded by an abundance of bacteria.

How termites arrange their social lives and how they protect themselves against illness are two main subjects being investigated by biological scientists. When termites encounter fatal fungal infections, the termites that first become aware of the disease start to send warning signals to the other members of the colony. Even at the cost of their lives, these members will continue to send warning signals. That is, for the health and prosperity of the whole society, some individuals of the group will sacrifice their own lives. One of these signals consists of the contractions and vibrations sent by the termite that caught the disease. One type of termite that makes its nest in wood starts to eat and destroy its nest when it catches an infection. The vibrations and sound of this activity are received by the other members of the colony, and they quickly realize that they are faced with an emergency situation. They then spring into action to move their nest to a more secure place. These communication experts exhibit different movements and behavior in order to inform others of different kinds of dangers. They use different methods to warn others about the existence of an intruder, or a hole in the nest, or a disease they have caught. Consequently, the vibrations and oscillations caused by the movements of the termites constitute a kind of Morse code for termites. In other words, termites talk to each other through these oscillations and vibrations, which to us appear as no more than a strange puzzle for us.

J. Traniello from Boston University investigated the communication systems termites use to inform each other about disease-making microorganisms as his research subject (Mechanisms of Disease Response in Termites) . He made a rectangular shaped Perspex (clear acrylic) nest which he has divided into two sections. The material used for the divisions allowed the termites to pass from side to side. Moreover, some tubes were also placed around the nest so that the termites could leave the nest. He placed termites in both of the sections. After an adaptation period, one part of the nest was infected by spores of a fatal fungus called Metahizium anisopliae, with the change in the behavior of the insects being observed and recorded. Termites that sensed the infected parts of the section started to move their bodies up and down and back and forth, as if they were breathing deeply and continued to depict seismic waves like oscillations and vibrations. Termites in the clean part of the nest felt these vibrations and within an hour had completely abandoned the nest. An interesting observation in the experiment was that the termites in the infected part stayed in the nest and continued to vibrate. In order to determine that the termites left the nest only after receiving the vibrations sent by the termites that had detected the infection, sound absorbent foams were placed between the sections, and the same experiment was carried out three times more. In the experiments conducted with the absorbent foam, despite the existence of the disease, the termites in the uninfected sections did not leave the nest. This proves that termites were receiving the vibrations from the infected termites and were replying to them by immediately deserting the nest.

It was thought that the termites in the infected area would also leave the nest after sending messages to the termites in the other section. This hypothesis, however, proved to be false. They stayed where they were and continued sending warning signals until they died. This was another example of the sacrifice observed in social insects that give up their own lives for the continuation of their society. The termite perceives the existence of a fatal bacteria attack and immediately starts to send warning signals; and by not abandoning their nest, they successfully put into effect a quarantine system. These social insects, without any intelligence, apply the quarantine system in such a precise manner that the disease is completely prevented from spreading. What is more, by sacrificing themselves for their society, they show that the principle of “if a person’s endeavor is for his nation, that person becomes a miniature nation on his own” is not only valid for human beings.

Ants, using a different method than termites, synthesize bacteria eliminating chemicals in their saliva glands that protect them from infectious diseases. These chemical combinations are very effective against bacteria and fungi. Ants protect themselves by covering their bodies with these substances at certain intervals. Termites, although in appearance not very different from ants, do not produce antiseptic substances in their bodies. Termites use a different strategy by establishing a symbiotic relationship with the bacteria that live in their intestines. Some termites that feed on decayed wood need enzymes to digest the cellulose. The cellulose needed by termites is synthesized by the bacteria in their intestines and turned into sugar. Thus, termites receive the glucose they need for survival and bacteria are provided with a comfortable berth in the bodies of the termites. Because of this symbiotic relationship, the production of fatal antibiotics that would kill the bacteria would be harmful to the termites themselves.

Instead of producing chemical compounds or antibiotics like ants, the seismic movements and self-sacrificing behavior depicted by the termites has given scientists the idea that it may be possible to benefit from termites as an early warning system for earthquakes. This idea is reflected in the Holy Qur’an, chapter Naml (The Ant), verse 18:

Until, when they reached a valley of ants, one of the ants said: “O you ants! Get into your dwellings lest Solomon and his army crush you unawares.”

This verse shows us the sensitivity of ants to vibrations. They have organs in their feet that are sensitive to movement. For one of those ants to have been able to warn the other ants, it must either have seen or sensed the coming of Prophet Solomon’s army. As obviously an ant cannot see an army coming from a long distance, they must have felt the vibrations made by the feet of the soldiers. We know that sound waves move very fast and are strong in solid objects. Because of this, by placing an ear onto railway track one can hear the vibrations of a train from far away. Termites most likely have an organ that receives vibrations that is similar to that of ants, because if a species can produce a signal (e.g. light, sound, or vibrations) for communication, they must also have an organ that is capable of receiving this signal. Since termites communicate with vibrations, they must also have an organ that is sensitive to weak vibrations. From this respect, if the code that is based upon some of the behaviors and vibrations used by the termites can be decoded, then are techniques of predicting earthquakes can be considerably improved.

The earliest records belong to ancient China. In 1235 Sung Tz’u, a Chinese “death investigator,” wrote a book entitled The Washing Away of Wrongs (translated by McKnight, 1981) in which what was known in forensic science at that time was detailed. In this text, an actual forensic entomology case was recounted, with the best known historic case being given. A murder had been committed in a little village in China. A man had been hacked to death with a rice-harvesting sickle. Because the village was one where rice was grown, everyone possessed a sickle, which meant that there were therefore many suspects. A professor at UC Davis, Robert Kimsey, explains how the murderer was caught; “The local magistrate very cleverly lined up every one of the farmers with their sickles out in the field. He walked up and down the line and pointed to the man who had committed the murder. The evidence he used to identify this man as a murderer-who later confessed, by the way-was the fact that green bottle flies were attracted to this man’s sickle. And nobody else, of course, had green bottle flies on their sickle because the flies were only attracted to a surface that had blood on it. No matter how rigorously you cleaned your sickle, you would still have remnants which these flies would be able to detect.”

Since those times, forensic entomology has made great progress. The way insect evidence helps justice works through the successive colonization of a corpse by a predictable succession of arthropod species. Different types of insects start coming right after death occurs. Organic remains, like flesh, blood, waste material, bone marrow, and hairs all attract certain types of insects. Owing to the time difference between the decaying body parts, the flies arrive at different times. They consume the parts that are nutritious for them and leave the body for another group.

As a manifestation of the divine name Quddus (the All-Holy), dead bodies decompose and nature is kept clean. Thus, the process started by microorganisms is made faster by the insects. Blow flies are among the first group of workers in this respect, whereas the dermestids, for instance, do their duty in the later stages of decomposition. The larvae of dermestids are not found before the body dry outs. The larvae and adults feed on dry skin and hair, as well as other dry dead organic animal matter. Dermestids are a common pest in homes, as well as being undesirable in insect collections and taxidermists collections at museums.

The first month after death is the most effective time for the application of forensic entomology. When death takes place, the insects start to arrive within minutes. However, it should be noted that insect evidence does not always tell us about the exact time of death. But at least we can infer that death occurred at a time that is greater than the age of the larvae that are developed in the body. If we have sound knowledge about the life cycles of the relevant insects, we can make more accurate predictions.

Another thing entomology helps us find out is the location of a murder. Sometimes a victim is moved after a murder in order to get rid of important evidence. For instance, a victim can be taken to a mountainous area after being killed in a town at low altitude. Entomologists can tell you about the habitat of the insects found on the body and give one a good idea about where the murder took place. Many insects live in very special geographical conditions. The altitude, temperature, and vegetation all affect the types of insects that live in the area. Furthermore, a meticulous entomological study will tell you whether the body has been, moved, the season in which it was killed, and whether the murder was committed indoors or outdoors.

Entomologists even help forensic experts with the cause of death. Particularly when the body has already decayed, it can be difficult for the police to determine the cause of death. In normal conditions, insects lay their eggs in certain parts of a body. If there are open wounds however, they will also lay their eggs there. So, if any eggs are found in unusual spots they indicate a probable wound.

When a murder or suicide is suspected to have resulted due to poisoning and if the body is decomposed, toxicological analyses that are made on the insects or the larvae taken from the body can help.

Bergeret (1855), who resided near Paris was the first westerner to use insects as forensic indicators. The body of a baby was found behind the plaster mantle in a house, and an investigation was begun. Bergeret determined that the assemblage of insects associated with the corpse pointed to a state of decay that dated back several years; consequently, the question of guilt was thrown upon the earlier occupants of the house, and not upon the current ones.

Case histories have documented the utility of medicocriminal entomology and point out the unique contributions that this field of science has made. Nuorteva et al. (1967, 1974) presented a series of cases from Finland in which blow flies were used as indicators for indoor as well as outdoor death scenes, and where the immature (larval) or adult stages were used for identification. Leclercq (1969) provided a typical case scenario and outlined how insect data were used to corroborate information obtained from other sources. Bernard Greenberg (1985) outlined several cases, including a description of how laboratory fly-rearing data were used to calculate the number of accumulated degree hours (ADH) required for certain blow fly species to develop, and how such data were applied to the solution of a murder case in Illinois. In another recent case, Greenberg described how the absence of insects in a seemingly straightforward death scene led to a killer’s confession. A window next to the victim had been open when the body was found, thus giving the impression that the murderer had forced entry into the room the night before. However, the air conditioned room was cool, even though it was very hot outdoors. In reality, the killer was known to the victim, had a key, and had returned to “set the stage,” opening the window just prior to feigning discovery of the corpse. The insects thus had insufficient time to colonize the body as the window had been closed prior to the return of the killer. When confronted by this biological reality as pointed out by medicocriminal entomology, the killer confessed.

A Hungarian ferry skipper had been condemned to life imprisonment for the murder of a postmaster, whose stabbed body had been found one evening in September on the ferry. The ferry skipper had arrived at 18:00 that day, and the body of the murdered postmaster had been found some hours later. The autopsy was performed the next day at 16:00. Masses of yellowish fly eggs and numerous newly hatched larvae of 1 to 2 mm in length were present, and the findings were recorded in the autopsy report. No attention was paid to this observation at the trial, however. On assumed evidence, the ferry skipper was condemned to life imprisonment in spite of his swearing that he was innocent. Eight years later the case was reopened. At the new trial, Dr. Mihalyi pointed out that no sarcophagous flies are active in Hungary after 18:00 in the month of September. He also recalled some of his experiments indicating that, at a temperature of 26 degrees Celsius, the yellowish eggs of Lucilia caesar (L.) hatch after 13 hours, those of L. sericata (Meigen) hatch after 10-11 hours, and those of Phormia terranovae Robineau-Desvoidy 14-16 hours after oviposition. These data, when applied to the case of the ferry skipper, led to the conclusion that it was not possible for the eggs to have hatched if they had been laid during the day the autopsy was performed, and that they must have been laid during the previous day before 18:00, since the flies are not active after this time. Dr. Mihalyi’s data on oviposition was verified and, on the basis of this and other evidence, the ferry skipper was released from prison.

Entomology, along with other sciences whisper in our ear that in “the Book of the Universe” there are different signs that lead us to the truth; they are there for us to use if we search for them and fulfill the requirement of causes. This is when the world will open its mysteries to us.

Reference

• http://www.ucdmag.ucdavis.edu/su99/Feature_Bugs.html
• http://www.research.missouri.edu/entomology/chapter1.html#history
• http://folk.uio.no/mostarke/forens_ent/casehistories/ferry_skipper.html
• The illustration is taken from the poster of the annual Insect Fear Film Festival at the University of Illinois, Feb. 2005.

Ants and Ecosystem³

The abundance of ants on earth is legendary. They live almost everywhere except very cold places such as Antarctica and Greenland. A worker is less than one-millionth the size of a human being, yet ants taken collectively rival people as dominant organisms on the land. Lean against a tree almost anywhere and the first creature that crawls on you will probably be an ant. Stroll down a suburban sidewalk with your eyes fixed on the ground, counting the different kinds of animals you see. The ants will win hands down. The British entomologist⁴ C. B. Williams once calculated that the number of insects alive on earth at a given moment is one million trillion, 1018. If, to take a conservative figure, one percent of this host is ants, their total population is ten thousand trillion. Individual workers weigh on average between one to five milligrams, according to the species. When combined, all ants in the world taken together weigh about as much as all human beings. But being so finely divided into tiny individuals, this biomass⁵ saturates the terrestrial environment.⁶

Ants absolutely dominate in rainforests, which are the most biologically diverse ecosystems on earth. Rainforests are so diverse that in a single leguminous tree (a relative to beans and peas) in Peru, 43 species of ants belonging to 26 genera⁷ were found, about equal to the ant fauna⁸ of the British Isles. In a single square mile of tropical forest in Peru or Brazil, there may be 1,500 or more species of butterflies-twice the total number found in the United States and Canada combined.⁹ In Amazon rainforests ants and termites together compose nearly a third of the animal biomass. In other words, when all kinds of animals, large and small, from jaguars to monkeys down to roundworms and mites, are weighed, nearly a third of the weight consists of the flesh of ants and termites.

All of the ants, composing in formal taxonomic classification the family Formicidae of the order Hymenoptera, contain about 9,500 species known to science and at least twice that number of species remaining to be discovered, most of which are confined to the tropics. The total number of species of social insects is about 13,500 out of a grand total of 750,000 insect species that have been recognized to date by biologists. These numbers show that social insects seem to constitute 2 percent of all insects yet, in terms of biomass, social insects are half or more of all insects. Why are ants and other social insects so successful in the terrestrial environment? Their strength comes from their social organization.¹⁰ In addition to the question of why ants and other highly social insect species have been so successful, it is also important to understand how such a large collection of individuals maintains order and collectively accomplishes tasks without producing chaos. With potentially thousands of individual ants to coordinate, how do they make decisions regarding who does what and when, especially critical decisions regarding reproduction?¹¹ These questions become even more intriguing when you realize that ants have quite limited sensory devices to experience the world. They also have relatively simple nervous systems that process only a limited number of stimuli and are aware of only a few minutes to a few hours into the past.¹²

What is Collective Intelligence?¹³

Intelligence can be defined simply as the ability to solve problems. One system is more intelligent than another system if in a given time interval it can solve more problems, or find better solutions to the same problems. A group can then be said to exhibit collective intelligence if it can find more or better solutions than the whole of all solutions that would be found by its members working individually.

All organizations, whether they are firms, institutions or sporting teams, are created on the assumption that their members can do more together than they could do alone. Yet, most organizations have a hierarchical structure, with one individual at the top directing the activities of the other individuals at the levels below. Although no president, chief executive or general can oversee or control all the tasks performed by different individuals in a complex organization, one might still suspect that the intelligence of the organization is somehow merely a reflection or extension of the intelligence of its hierarchical head. This is no longer the case in small, closely interacting groups such as soccer or football teams, where the “captain” rarely gives orders to the other team members. The movements and tactics that emerge during a soccer match are not controlled by a single individual, but result from complex sequences of interactions. Still, they are simple enough for an individual to comprehend, and since soccer players are intrinsically intelligent individuals, it may appear that the team is not really more intelligent than its members.

With the growing interest in complex adaptive systems, artificial life, swarms, and simulated societies, the concept of “collective intelligence” is coming more and more to the fore. The basic idea is that a group of individuals (e.g. people, insects, robots etc.) can be smart in a way that none of its members is. Complex, apparently intelligent behavior may emerge from the synergy created by simple interactions between individuals that follow simple rules.

How do ants succeed?

Now we have lots of questions to ask about the success of ants as a group. How do they govern? Who is the ruler? How do they foresee the future? How do they elaborate plans and preserve equilibrium? These, indeed, are puzzling questions. Every single ant in a colony seems to have its own agenda, and yet an insect colony looks so organized. The seamless integration of all individual activities does not seem to require a supervisor. For example, leaf-cutter ants cut leaves from plants and trees to grow fungi. Workers forage for leaves hundreds of meters away from the nest, literally organizing highways to and from their foraging sites. Weaver ant workers form chains of their own bodies, allowing them to cross wide gaps and pull stiff leaf edges together to form a nest. Several chains can join to form a bigger one over which workers run back and forth. In their moving phase, army ants organize impressive hunting raids, involving up to 200,000 workers, during which they collect thousands of prey.¹⁴

A harvester ant colony performs many tasks: It must collect and distribute food, build a nest, and care for the eggs, larvae, and pupae. It lives in a changing world to which it must respond. When there is a windfall of food, more foragers are needed. When the nest is damaged, extra effort is required for quick repairs. Task allocation is the process that results in certain workers engaged in specific tasks, in numbers appropriate to the current situation. Task allocation is a solution to a dynamic problem and thus it is a process of continual adjustment. It operates without any central or hierarchical control to direct individual ants into particular tasks. Although “queen” is a term that reminds us of human political systems, the queen is not an authority figure. She lays eggs and is fed and cared for by the workers. She does not decide which worker does what. In a harvester ant colony, many feet of intricate tunnels and chambers and thousands of ants separate the queen, surrounded by interior workers, from the ants working outside the nest and using only the chambers near the surface. It would be physically impossible for the queen to direct every worker’s decision about which task to perform and when. Consider the commercially available ant farms being sold. Since it’s forbidden to transfer ant queens, in the US ant farms are sold with only worker ants. Still they work in harmony. They build their nest, they build bridges, they collect food and they defend their colony. They do all these things without a queen. The absence of central control may seem counterintuitive, because we are accustomed to hierarchically organized social groups in many aspects of human societies, including universities, businesses, governments, orchestras and armies. This mystery underlies the ancient and pervading fascination of social insect colonies.

No ant is able to assess the global needs of the colony, or to count how many workers are engaged in each task and decide how many should be allocated differently. The capacity of an individual is limited. It cannot make complicated assessments. It probably cannot remember anything for very long. Its behavior is based on what it perceives in its immediate environment. Each worker needs to make only fairly simple decisions. There is abundant evidence, throughout physics, the social sciences and biology that such simple behavior by individuals can lead to predictable patterns in the behavior of the group. It should be possible to explain task allocation in a similar way, as the consequence of simple decisions by individuals.

Though ant colonies must respond to changing conditions, the response does not have to be perfect. It is not like clockwork, or an army, each unit snapping into place so the whole system ticks on without a hitch. There must be enough ants to collect food, often enough for the colony to survive and grow. The appropriate range of numbers should be allocated over a set of similar occasions. If the colony did not get enough food today, perhaps it will tomorrow. The process results in more or less the right number of ants engaged in the appropriate task, often enough for the colony to carry on.

Maximizing the number of ants that perform each task may not always be best for the colony. A task allocation problem for a human city is how to get the right number of firefighters to the scene of a fire. It may be a waste to have too many firefighters on the city payroll. Too many ants allocated to each task may be expensive for a colony if the excess ants could be doing something more useful than waiting around when they are not needed.

The most difficult thing to grasp about task allocation is that it is not a deterministic process even at the individual level. An ant does not respond the same way every time to the same stimulus; nor do colonies. Some events influence the probabilities that certain ants will perform certain tasks, and this regularity leads to predictable tendencies rather than perfectly deterministic outcomes. The ant is jostled in a stream of events that send it sometimes into one task, sometimes another. Task allocation is not a system in which each ant awaits the crucial event that defines its status forever. Like a twig in a turbulent river, an ant may tend to go in one direction, but there are many places it could get washed ashore, to be picked up and then swept in another direction altogether.

Stories about totalitarian societies, inexorable armies, and voracious monsters are often told as stories about ants. But ants have no dictators, no generals and no evil masterminds. In fact, there are no leaders at all.

In short, the basic mystery about ant colonies is that there is no management. A functioning organization with no one in charge is so unlike the way humans operate as to be virtually inconceivable. There is no central control. No insect issues commands to another or instructs it to do things in a certain way. No individual is aware of what must be done to complete any colony task. Each ant scratches and prods its way through the tiny world of its immediate surroundings. Ants meet each other, separate, go about their business. Somehow these small events create a pattern that drives the coordinated behavior of colonies.¹⁵

Elements of Collective Intelligence¹⁶

More is different. This old slogan of complexity theory actually has two meanings that are relevant to our ant colonies. First, the statistical nature of ant interaction demands that there is a critical mass of ants for the colony to make intelligent assessments of its global state. Ten ants roaming across the desert floor will not be able to accurately judge the overall need for foragers or nest-builders, but two thousand will do the job admirably. Individual ants do not know that they are prioritizing pathways between different food sources when they lay down a pheromone¹⁷ gradient near a pile of nutritious seeds. In fact, if we only studied individual ants in isolation, we’d have no way of knowing that those chemical secretions were part of an overall effort to create a mass distribution line, carrying comparatively huge quantities of food back to the nest. It is only by observing the entire system at work that the global behavior becomes apparent.

Ignorance is usually useful for ants. The simplicity of the ant language-and the relative stupidity of the individual ants-is, as the computer programmers say, a feature but not a bug. Emergent systems can grow unwieldy when their component parts become excessively complicated. Better to build a densely interconnected system with simple elements, and let the more sophisticated behavior trickle up. That is why an ant does not respond to all stimuli around her, namely she ignores until she decides that the stimulus is strong enough to be responded to.

Encourage random encounters. Decentralized systems such as ant colonies rely heavily on the random interactions of ants exploring a given space without any predefined orders. Their encounters with other ants are individually arbitrary, but because there are so many individuals in the system, those encounters eventually allow individuals to gauge and alter the state of the colony itself. Without those haphazard encounters, the colony would not be capable of stumbling across new food sources or of adapting to new environmental conditions.

Look for patterns in the signs. While the ants do not need an extensive vocabulary and are capable of syntactical formulations, they do rely heavily on patterns in the semiochemicals they detect. A gradient in a pheromone trail leads them toward a food source, while encountering a high ratio of nest-builders to foragers encourages them to switch tasks. This knack for pattern detection allows meta-information to circulate through the colony mind: signs about signs. Smelling the pheromones of a single forager ant means little, but smelling the pheromones of fifty foragers imparts information about the global state of the colony.

Pay attention to your neighbors. This may well be the most important lesson that the ants have to give us, and the one with the most far-reaching consequences. You can restate it as “Local information can lead to global wisdom.” The primary mechanism of swarm logic is the interaction between neighboring ants in the field: ants stumbling across each other, or each other’s pheromone trails, while patrolling the area around the nest. Adding ants to the overall system will generate more interactions between neighbors and will consequently enable the colony to solve problems and regulate itself more effectively. Without neighboring ants stumbling across one another, colonies would be just a senseless assemblage of individual organisms-a swarm without logic.

Conclusion

Ants, first of all, have something to teach us about how nature works. Any system whose behavior arises from the interactions of its components has something in common with ant colonies. Using ants and other social insects as models, computer scientists have developed software agents that cooperate to solve complex problems, such as the rerouting of traffic in a busy telecom network or internet. Another example, the famous traveling salesman problem, in which a salesman tries to find the shortest and fastest route between many cities, is almost impossible to solve definitively. But with the methods inspired by ants the problem can be solved at least approximately, because ants are very good at finding the shortest path between the food and the nest collectively. Collective robotics borrowed from collective intelligence in ant colonies is being used to manage systems composed of lots of robots in synchronization.

Nature is a book to be read by the people who approach it to live in harmony, not to dominate. We are not the owners of the beautiful things around us, but observers searching for signs which reveal the wisdom behind them.

Footnotes

1. Haskins C.P., Of Ants and Men, Prentice-Hall Inc., 1939.
2. Huxley J., Ants, AMS Press, 1969.
3. An ecosystem is a grouping of plants, animals, and other organisms interacting with each other and with the environment in such a way as to perpetuate the grouping more or less indefinitely.
4. The scientific discipline in which ants are studied is called myrmecology and it is one of the branches of the study of insects, entomology.
5. Biomass is the total weight of all living organisms in a biological environment.
6. Holldobler B. and Wilson E.O., Journey to the Ants, Harvard University Press, 1994.
7. The word Genera is the plural of genus. Genus is a taxonomic category ranking below a family and above a species and generally consisting of a group of species exhibiting similar characteristics.
8. Fauna (Flora) is the animals (plants) of a particular region or period, considered as a group.
9. http://www.savenature.org/images/pdfs/ecoandinsects.pdf
10. Holldobler and Wilson, ibid.
11. Bonabeau E., Dorigo M., and Theraulaz G., Swarm Intelligence: From Natural to Artificial System, Santa Fe Institute Studies in the Sciences of Complexity, Oxford University Press, NY:1999.
12. Holldobler and Wilson, ibid.
13. Heylighen, F. “Collective Intelligence and its Implementation on the Web: Algorithms to Develop a Collective Mental Map,” Computational & Mathematical Organization Theory. 1999, Vol. 5, no. 3, pp. 253-280.
14. Bonabeau et al, ibid.
15. Gordon D., Ants at Work, W. W. Norton. 1999.
16. Johnson S., Emergence Simon & Schuster. 2001.
17. The pheromone is the semiotic chemical ants use to communicate with each other and with other colonies. Every colony has its own odor. That is why ants can recognize their sisters from the same colony easily.