Humans have a true chin, a distinct bony projection at the front of the jaw, and no other animal has anything quite like it. After more than a century of study, anatomists and evolutionary biologists ...
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Humans are born with tails but lose them before birth, and scientists still don’t know why we have them at all
Early in pregnancy, something surprising happens. Every human embryo develops a tail. It is not symbolic or imagined. A real extension forms at the base of the spine, complete with vertebrae. Later, ...
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