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 -- ...

Lizards come in all shapes and sizes, most of them of the smaller nature. What Joycelyn Penson encountered while visiting her son's home in Orland was not small. Penson spotted (and nabbed video of) a ...

With its sharp claws, scaly skin and venomous bite, Guatemala's "Sleeping Child" lizard has earned itself few human friends. One of them, forest ranger Juan Alvarado, has spent the last 17 years of ...