Scientists believe that when the frog is threatened, it extends bone claws out of its toe pads in a way that is reminescent of Wolverine. "At rest, the claws of T. robustus, found on the hind feet ...

A frog with retractable claws? Weird. A frog with claws that it has to push through its skin to use? Even weirder. Hosted by: Hank Green Huge thanks go to the following Patreon supporters for helping ...

The development of hair was of central importance for the evolution of mammals and thus also of humans. However, the evolutionary origin of the genetic program of hair was previously unknown.