SORU: aşağıdaki parçaya göre cevaplayınız
It is emphasized in the passage that a great deal of information ----.
Despite all the attention we give to our hair, and
putting aside the fact that the first synthetic hair
dyes were created in 1907, it has really only been
in the last 50 years or so that hair has been
scientifically studied. Before that, it was deemed
too trivial to be worthy of the attention, but the
amount that scientists can now tell about a person
from the study of their hair, often simply by looking
at it under a microscope, is remarkable. Humans
have around five million body hairs which is as
many as a chimpanzee has, although ours are
smaller and finer. They come in three types. An
unborn baby has a kind of fine down all over its
body that begins to grow about 12 weeks after
conception. Normally, these "lanugo" hairs are
shed a few weeks before birth, although some
premature babies are born with them. After birth
and throughout our lives, humans are covered in
short "vellus" hairs just a centimetre or two long
and with little or no pigment. Finally, the
pigmented, thicker hairs that grow in varying
quantities on our heads, groin, armpits, forearms
and legs, and (on men) chests, stomachs and
faces, are "terminal" hairs.