Mammalian hair has a surprising evolutionary origin, according to a study published in __PNAS__ this week: the reptilian claw. Evolutionary biologists have long conjectured about the origin of hair -- ...

Three near-identical U.S. lizards have kept their identities for millions of years in a way that researchers compare to the ...

If you live in California, you’ve probably seen, or held, a western fence lizard. According to a leading dataset of animal and plant observations, the species is the most commonly spotted reptile in ...