Those wiry extensions scattered about our bodies and concentrated on the head evolved from our reptilian and avian ancestors. Credit: dreamstime.From Live Science:
Having a bad hair day? You're excused. After all, hair has its origins in stuff that used to make just claws. Research now suggests that hair of all kinds extends much further back into evolutionary time, with birds and reptiles having genes for hair proteins.
Scientists previously had thought hair was just a mammalian thing, with its evolution cropping up after the mammalian lineage split from the reptilian lineage. The first mammals arose on Earth about 210 million years ago. Humans, birds and reptiles have a common ancestor that goes back some 300 million years, said researcher Leopold Eckhart of the Medical University of Vienna in Austria.
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