Snippet from the article at Wired.com —
The leading theory on the origin of hair has been challenged by findings suggesting that mammalian locks originated in reptilian claws.
A genetic analysis of lizards and chickens â€” those feathery descendants of reptiles â€” uncovered genes that code for keratin, a hard protein whose derivatives form hair.
Interesting theory! Read the full article here: Origin of Hair Theory Gets Roots Retouched.