We have to breathe in order to live. The oxygen, which is essential for us, is cleansed and its heat and moisture are regulated as it passes turbulently down the narrow channels of the nose. Thus, the air we breathe is made ready for service to the alveolus in the lungs. In this way, approximately fifteen square meters of air, which is inhaled with 23,000 breaths daily, is processed in the nose.

The area behind the nostrils has been equipped with an acclimating system that is astonishingly sensitive and which scientists have difficulty explaining. This system not only regulates the heat and moisture of air, but at the same time, it possesses a mechanism that perceives harmful molecules in the contents of the air and gives an alarm. By stimulating the nose’s mucosa, this alarm mechanism shows activity by evacuating with the speed of a hurricane the air in the lungs via the nose and mouth-this is what we call sneezing. As a result of sneezing, the harmful matter that entered the body with the inhaled air is expelled from the body.

How and why do we sneeze?

It is a Divine blessing that we do not become ill frequently in spite of the millions of microorganisms that enter our body everyday mainly through the air we breathe. The microbes that enter our noses with the air we breathe are caught together with dust by tiny hairs here called cilia. Those that escape here are asked for a password by the anti-bacterial mucus secretion emitted by the epithelium tissues in our noses. In order for smells to be perceived by the nerve cells of molecules, the thickness of mucus must be around .06 mm. If the mucus layer were thicker, our sense of smell would be decreased, and if it were thinner, the defense system would weaken and cilia would be easily harmed. In addition, with its content and density, this secretion is responsible for filtering foreign particles in the air and for moisturizing the air to make it suitable. Because it is dangerous for things to pass this point, the body’s alarm that we call sneezing kicks in and microbes are expelled in this way. Sneezing is one of the most important defense mechanisms of the upper respiratory system. When the thresholds of the special nerve cells in the nose are stimulated, the signals reach the brain and the sneezing reflex kicks in. The mucus tissues are stimulated, mucus is secreted and the capillaries widen. Meanwhile an itching or tingling sensation is felt in the nose. As a result of the warning coming from the brain to the head, neck and stomach muscles, air is closed into the area where the vocal chords are and pressure is greatly increased in the lungs. Later, while the air is suddenly and loudly forced out, the foreign matter in the nose and respiratory path are thrown out. Because the nerves responsible for sneezing are also connected to the eyes, tears are usually secreted during sneezing and at this time the eyes involuntarily close.

In addition to the discomforts of the flu, the common cold, and bronchitis causing sneezing, external factors like nose polyps, flying pollen, dust, perfume, animal hairs and even suddenly looking at the light can also cause it. Because some people are sensitive to certain factors, they can be affected faster and they will sneeze. Some are more amenable to sneezing during certain periods. For example, it has been determined that pregnant women are more inclined to sneeze due to the hormonal change they are experiencing. It has also been established that the members of some families sneeze consecutively in certain numbers (3-5 times); this situation supports the idea that sneezing attacks can be hereditary. It is known that men sneeze more than women and that white people sneeze more than black people. One out of five people sneeze when they look at a bright light while walking in the dark. Due to the sudden reflection of light, the pupil of the eye contracts and the emission of tears increase. This emission reaches the upper division of the nose cavity by means of the tear ducts and, stimulating the mucus tissue in the nose, it triggers sneezing. In illnesses such as the common cold, the mucus in the nose quickly triggers sneezing because it is more sensitive.

Beware of cluster bombs

Sneezing is one of the rare moments when the body desires a situation different from its normal functioning. Sneezing and coughing lead to a movement of air strong enough to break the mucus bond, and as a result, droplets are formed. It has been established that the speed of air and the particles in it while being expelled from the mouth at this time is close to 100 miles per hour. Those who carry the viruses of illnesses like the flu scatter about close to one hundred million microorganisms during sneezing-like a cluster bomb. From 2,500–5,000 droplet seeds can remain in the air for hours in the cloudlet that has been formed. As the diameter of the droplet seeds decreases, their period of staying in the air increases. The diameter of droplet seeds that remain in the air for a long time and cause the spread of illnesses is between one and five microns.

Rather than food and drink, tuberculosis spreads by deep respiratory movements like sneezing and coughing via droplets loaded with bacillus. Dispersing in the air into smaller particles, the droplets are inhaled by healthy people by means of the respiratory path.

If necessary precautions are not taken in regard to a viral infection, it can spread throughout the world in one month, because the droplets carrying the virus can travel forty meters when you sneeze, six meters when you cough, and two meters when you talk. For this reason, illnesses like the flu which spread with droplets are frequently seen during the winter. For one person sneezing several times in places where there are crowds of people means that the virus spreads to hundreds of people within a few minutes.

Is sneezing beneficial?

The movement of cilia in the upper respiratory path is very important in regard to the health of the lungs. They hold the harmful matter coming with the air, trigger the sneezing reflex, and together with mucus, prevent them from entering the lungs, thus performing a very important protective duty. The expulsion from the body of matter that is probably harmful together with the air in the lungs is a blessing that provides a person with a great benefit. Consequently, formerly natural powders like black pepper known as snuff were breathed into the nose in order to sneeze. While sneezing, the brain and cardiovascular veins expand and tear and sinus ducts open; thus, the dead air we normally cannot exhale is forced from our lungs.

When sneezing, a high amount of pressure is generated in the body, especially in the stomach area and brain. Due to this pressure, a lot of blood goes to the cardiovascular veins, and in fact, serious situations like fainting can occur during sneezing attacks. However, sneezing is beneficial to a healthy heart. Fully closing the mouth and holding the breath while sneezing can bring about bursting and tearing in the lungs. The ribs can even break with an intense and unbalanced sneeze. If a person tries to stifle the sneeze after the sneeze reflex has occurred by closing his mouth and nose, he can harm the brain and bring on paralysis or when the pressure increases in the capillaries in the brain, bleeding can occur. In this situation, people, especially those who have undergone an operation, can be seriously harmed. In addition, veins in the eyes can expand and rupture. When sneezing is triggered, a person should relax and not prevent the sneeze.

In addition to providing protection against harmful things that have entered the respiratory system, sneezing is a reflex that is a means for relaxation, relief and invigoration of the body. If this reflex had not been put in the body, it would be difficult to escape many harmful things that would give discomfort. During sneezing, the rest period after diastole of the heart increases. This is probably the reason why we say, “Bless you” when someone sneezes. Prophet Muhammad, peace and blessings be upon him, said, “One of the six rights of a believer over another is to make a prayer when he or she sneezes,” and “One of the times when prayer is accepted is at the moment of sneezing.” It was related that the Prophet, peace and blessings be upon him, “covered his face with his hands or a cloth when he sneezed and he lowered his voice.”

We are being reminded of the value of our health which God bestows upon us anew each time we sneeze. Sneezing is a cloud of mercy not only for us, but also for those who witness this moment with prayer and with whom we share feelings of gratitude.

Adem Arikanli is a freelance writer from Turkey with an interest in health and biology.

A person living fifty years ago would have found nothing extraordinary in this verse. Yet it is, read in the light of what we know now of atmospheric physics, extraordinarily rich in meaning and significance.

The materialists of the last century regarded rain as the simple precipitation of water vapour and even expected, in their godless arrogance, to be able to produce rain at will. Moreover, they ridiculed those who would pray for rain. It was not realized at that time that the phenomenon of rainfall, i.e. the conversion of a cloud into rain, is not such a simple event after all. An atheistic science was unable to pose, let alone seek to answer, a number of key questions:

1. How can vapour, which is regarded as gaseous water, remain in the same form in atmospheric strata, such as the Siberian skies, where temperatures can drop to forty degrees below zero? Why does it not fall as ice blocks?

2. How does the size of raindrops come about, and in what measure and form do raindrops descend to earth? What are the preconditions for the formation of raindrops of such a convenient size and shape?

3. How does a cloud vaporize, and how and whence does the salt in clouds come to be there, seeing that salt cannot be vaporized at the boiling point of water?

Over the last twenty years, rational-if still only partial-answers have been found to these puzzling questions. Let us now re-read the sacred verse, and identify its relevant points:

a. God regards rain as a physical event of the same order of significance as the resurrection of the dead. That is the meaning of His saying that we will be brought forth from the earth just as He has sent water from the sky in due measure and brought a dead land to life.

b. The Qur’an describes rain as a carefully measured descent of water, the idea of ‘measure’ being conveyed in the phrase bi-qadarin which indicates an ordered and calculated, willed and deliberate, measuring-the definition of a mathematical program.

c. ‘…and We raise to lift therewith a dead land.’ This sentence, the central portion of the verse, is likewise no ordinary statement. It refers directly and specifically to a dead land being raised to life; it does not say ‘plants emerge from it’. We shall examine the implications of this choice of phrasing below.

Let us now briefly review the scientific aspects of the miracle of rain. The results of the latest research have shed light on many previously unknown points relating water, clouds and rain. In doing so, they provide a wonderful exposition of the verse we are considering. We may summarise these points as follows:

1. A study done in the United States by Vincent J. Schaeffer has revealed that particles of water do not freeze down to -40 C when they are very fine and pure. Water has to be impure and formed of large masses in order to freeze at 0 C. A cloud is a special physical structure that is formed of water vapour which is immediately converted into minute water droplets. It therefore does not share the properties of ordinary water. Atmospheric clouds do not freeze and descend even at -30 C.

2. Clouds are formed by the agglomeration of tiny water droplets around particles of salt or cosmic dust. These tiny nuclei constitute the basis for rain. The origin of cosmic dust is unknown; also, the way in which the dust particles become lodged in the cloud is not yet well understood. However, it is believed that the water at the ocean surface participates in the vaporization process by contributing particles of salt.

3. It is conjectured that there are about one billion water particles per cubic millimeter during cloud formation. There are 50-500 cloud droplets per cubic centimeter in clouds. How these droplets are converted into raindrops is a matter of considerable controversy.

4. Up until 1950, the theory of Bergeron-Findeisen was the most widely accepted explanation of cloud droplets. According to Bergeron-Findeisen, the water droplets first form condensation nuclei, and raindrops then coalesce around them.

However, according to more recent studies, the growth of a cloud droplet over time proceeds concomitantly with various circumstances. A drop of water gradually assumes the nuclear state, overcoming conditions even of forty degrees below zero, and produces rain through a very complex equation:

5. As for the production of rain, minute water particles first coalesce around the condensation nucleus. Then, as they grow, the surface area of these water particles increases as they approach the ground. The increase in surface area in turn allows the velocity of the raindrop to be checked by air friction, with the result that rainfall acquires a gentle descent. This balancing process is a miracle of Divine compassion: by the time the raindrop touches ground, it has slowed down to make a soft landing, almost as if by a parachute. The equation for this descent and balanced speed is:

In the light of current scientific knowledge, the sentence Who sends down rain from the sky in due measure can only mean to us that the descent of rain is a matter of the finest, most subtle calculation. Linking it to the latter part of the verse, it is a miracle of Divine science akin to the raising of the dead.

Present day atmospheric physics also regards rain formation and rainfall as a scientific wonder, and many volumes have been devoted to the subject. Interested readers may usefully consult Robert Byes’ Elements of Cloud Physics and Louis J. Nin’s Cloud Physics and Cloud Seeding.

We now come to the implications of the second sentence in the verse: and we raise to life therewith a dead land.

When soil is dry, it is apparently lifeless. In fact the soil is very much alive, needing rain for its life to he activated. What does science have to say about this?

There are a million times a million bacteria in a gram of soil. These bacteria become wholly inactive, dormant, when it does not rain for a long time. It is as if they change into lifeless genetic codes. All these microbes revive when rain falls, and initiate a large production campaign beginning with nitrogen fixation. Their activity gives life in turn to thousands of small organisms. It is as if a dead underground city has come to life. Fertilizers form, the seeds of innumerable small plants revive, opening channels under the ground with their roots, like the roads of a city. Next, small insects and ants, each with their own nests, burrow under the earth, making it comparable to a large city. This is how a ‘dead land’ is revived.

What is the life-giving secret of rain? This part of the verse directs our attention to the connection of rain, and so of water, with life.

The basic chemical substance of living things is a bridge of hydrogen, lending continuity to the life of an organism, which we call the ‘hydrogen bonds’. The hydrogen is changed frequently, forming new bonds and transferring vitality. Since this hydrogen can be replaced only by the hydrogen produced during the ionization of water, water is indispensable for life.

This rule holds for all living things. A dehydrated organism is like a frozen skeleton even if it preserves its DNA and its genetic code: it can neither move nor reproduce. When water arrives and donates hydrogen from its separating H and OH ions, the code of life jumps into action. This is easily seen, particularly in the case of microbes. In more developed organisms, vitality cannot be restored even when water arrives because the tissue layers have been damaged by dehydration. The ‘revival of the dead land’ alludes to such profound biological laws.

We now turn to the last part of the verse: even so will you be raised [from the dead]. Our resurrection, the verse here declares, is a similar activation by Divine command of our codes remaining in the soil. It declares that just as the rain activates the genetic codes in a dead land and suddenly regenerates life, the codes will be processed and revived with the speed of a computer as soon as the Divine Will gives the order: ‘Come to life, arise.’ And finally, the analogy with rain means that God, Who gives life under the ground by sending a hydrogen ion, can doubtless also restore us to life when He wills.

Approximately ten billion human beings have lived on earth since Adam. The size of each individual’s code is about 1 micron; if you collected them all, they would not fill a glass. If God were to pour the genetic codes of all the humans He created from a glass into the soil, including those whose codes have been lost, and were to say ‘Now, Be!’, all human beings would be recreated in the twinkling of an eye

This is the similitude that God provides through this verse, for those possessed of knowledge with understanding. In effect, He is declaring: ‘Just as I have given life to an entirely lifeless land by means of a raindrop, it is no trouble at all for Me to reactivate the hydrogen in your biological genetic codes.’