Page 89 - Design in Nature

An adult dolphin radiates sounds inaudible to
humans (20,000 Hz. and above). These waves are
released from the lobe, called
Spiracular Nasal
cavity sacs Melon "melon", in front of their heads.
It can direct these waves at will
Ultrasonic sound waves
by moving its head. The sonar
waves are immediately reflected
when they encounter any
Echo obstacle. Lower jaw acts as a
receptor, which transmits the
Inner ear
signals back to the ear. Ear
forwards the data to the brain, which analyzes
and interprets the meanings.

dolphin's head. The melon, which is a fatty structure in the dolphin's
forehead, serves as an accaustical lens and focuses the clicks of the dolphin
into a narrow beam. Therefore, the dolphin can direct the clicks at will by
moving its head. It can direct these waves at will by moving its head. The
clicks immediately echo back when they hit any obstacle. The lower jaw
acts as a receptor, which transmits the signals back to the ear. On each side
of the lower jaw is a thin bony area, which is in contact with a lipid
material. Sound is conducted through this lipid material to the auditory
bullae, a large vesicle. Then the ear forwards the data to the brain, which
analyses and interprets the meanings. A similar lipid material also exists in
the sonar of whales. Different lipids (fatty compounds) bend the ultrasonic
(sound waves above our range of hearing) sound waves traveling through
them in different ways. The different lipids have to be arranged in the right
shape and sequence in order to focus the returning sound waves. Each
separate lipid is unique and different from normal blubber lipids and is
made by a complicated chemical
process that requires a number of
different enzymes. This sonar system in
dolphins could not possibly have
developed gradually, as claimed by the
theory of evolution. That is because
only by the time the lipids would have
evolved to their final place and shape,
could the creature have made use of
this crucial system. In addition, support systems like the lower jaw, the
inner ear system and the analysis centre in the brain would all have to be
fully developed. Echolocation clearly is an "irreducibly complex" system,
which for it to have evolved in phases is simply impossible. Hence, it is
obvious that the system is another flawless creation of Allah.