Long before humans walked the Earth, the skies of South America were ruled by a colossal bird. Argentavis magnificens, one of ...

A prehistoric bird that lived and died 120 million years ago has presented forensic paleontologists with a baffling medical mystery. Somehow, it managed to die with more than 800 tiny pebbles in its ...

Believed to have existed since ancient times, the prehistoric Takahe birds of New Zealand have become a success story for conservation. The birds, which were declared extinct in 1898, have now begun ...

Around 120 million years ago, a bird swallowed over 800 tiny stones and choked to death as a result. Paleontologists aren’t sure why. Like many recent fossil “discoveries,” researchers with the Field ...

The shared history of birds and dinosaurs is well-established, but exactly how true birds evolved during the Mesozoic is a bit of a mystery. Adding to this conundrum are fossilized footprints of ...

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

The fossil record isn't always kind to preserving the existence of smaller creatures. But this week, scientists announced the discovery of two previously unknown species in two separate studies ...

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 ...

Navaornis hestiae (center) documents a previously unknown intermediate stage in the evolution of the central nervous system between the earliest birds (like Archaeopteryx on the left) and living birds ...

think the biggest bird around is an ostrich think again the prehistoric world was home to birds so massive so terrifying they'd make an ostrich look like a pet parakeet ever seen a creature as big as ...