Miracles of the Qur’an:

THE EARS ARE ACTIVE DURING SLEEP
So We sealed their ears [with sleep]in the cave for a number ofyears.
(Surat al-Kahf: 11)
The original Arabic of the phrase"We sealed their ears" in the Qur'an
is the verbdaraba. This bears the metaphorical meaning of "We have
made them sleep." Used in reference to the ears,darabameans
"preventing the ears from hearing." The fact that only the sense of
hearing is mentioned here is very significant.
According to recent scientific discoveries, the ear is the only
sensory organ active while a person is sleeping. This is why weneed an
alarm clock to wake up. The wisdom of the phrase "We sealed their
ears" is, in all probability, that Allah closed the hearing of the
young people in question, for which reason they remained asleep for
many years.
THE IMPORTANCE OF MOVEMENT IN SLEEP
You would have supposed them to be awake, whereas in fact theywere
asleep.We moved them to the right and to the left,and, at the
entrance, their dog stretched out its paws. If you had looked down and
seen them, you would have turned from them and run, and have been
filled with terror at the sight of them. (Surat al-Kahf: 18)
The above verse refers to the Companions of the Cave, who remained
asleep for hundreds of years. In addition, Allah also reveals that He
moved their bodies to the left and right. The wisdom of this was only
discovered in recent times.
People who remain lying down inthe same position for long periodof
time encounter serious health problems, such as circulation
difficulties, sores, and blood clotting in that part of the body in
contact with the surface on which they lie.
The resulting sores are known as"bed sores" or "pressure sores." Due
to the constant pressure on one part of the body when one is not
moving for a long period of time, the blood vessels become constricted
and can close altogether. As a result, the oxygen and other nutrients
carried by the blood fail to reach the skin, and the skin begins to
die. This leads to the appearance of sores on the body. Unless these
sores are treated, fat and muscles can also die.
These sores, which form under the skin or tissue, can assume serious
dimensions unless treated. If they become infected, they can even lead
to death. The healthiest thing to do, therefore, is to change the
position of the body every 15 minutes in order toreduce this pressure.
Patients who cannot move themselves therefore receive special care
andare moved every 2 hours by otherpeople. The fact that these medical
facts, only discovered in the last century, are referred to inthe
Qur'an is yet another of its miracles.