The African clawed frog is used as a model organism for biological research because of its close evolutionary relationship to humans, and because early development occurs externally, allowing ...

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.

A brilliantly orange frog small enough to sit on your fingernail spent years hiding from scientists in plain sight deep in ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Paleontologists working in Patagonia have unearthed the oldest-known ...

Australian tree frogs today make up over one third of all known frog species on the continent. Among this group, iconic species such as the green tree frog (Litoria caerulea) and the green and golden ...

The discovery of a rare species of Indonesian frog that breathes without lungs could shed light on how evolution works, a scientist said on Friday. A dissection of the frog, found on Borneo island ...