No birds alive today have teeth. But that wasn't always the case; many early fossil birds had beaks full of sharp, tiny teeth. In a paper in the journal Cretaceous Research, scientists have described ...

Native only to Guatemala and parts of the Mexican state of Chiapas, the horned guan is a strange and unusual bird.

An illustration of the fossil skeleton of the new bird species Imparavis attenboroughi and a reconstruction of what the animal would have looked like in flight ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. There are some weird and wacky creatures out in the animal kingdom, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A peculiar fossil ...

In the vast, arid landscapes of South Australia's northeast, on the lands of the Adnyamathanha and Wilyakali, a surprising discovery is changing our understanding of one of Australia's most endangered ...

Flight is one of the rarest and most powerful abilities ever developed in nature, completely changing how animals hunt, survive, and explore the world. From birds and bats to insects, flying species ...

Discovering a strange, speaking bird with a weirdly deep voice that can also dramatically change the size of its body in an instant in your home sounds like a great premise for a movie. It works as ...