"We are talking about a species that was larger than 2.5 meters [8.2 feet] and weighed more than 150 kilograms [330 pounds]," study author Federico Javier Degrange with the Center for Research in ...

From about 60 million years ago, when they arose, until they went extinct 57 or so million years later, the family of birds known as phorusrhacids spread across South America, ultimately becoming ...

When a large asteroid hit Earth 66 million years ago, not all the dinosaurs went extinct. Birds, feathered dinosaurs that have thrived since the Jurassic, survived—and some of these birds were ...

A 10-foot-tall carnivorous bird roamed the Earth millions of years ago, but it wasn’t trapped in isolation. A new study suggests its territory reached South America, North America and even Africa.

About 3.5 million years ago, carnivorous birds with hooked beaks standing 10 feet (3 meters) tall roamed parts of South America in search of prey. Now, researchers have found a nearly complete ...

The 12-million-year-old fossil, known as a tibiotarsus, belonged to a now-extinct creature in the Phorusrhacidae family, which was made up of mostly flightless, giant, meat-eating birds known ...

A first near-complete skull of the prehistoric giant is unearthed in Argentina, giving scientists new insight into the agility of the flightless monsters ...

A Haast’s eagle attacks a moa pair. John Megahan, PLOS Biology, 3(1): e20 via Wikipedia under CC By 2.5 Evolution has a fondness for big birds. During the past 66 million years, repeated on ...

Aristos is a Newsweek science and health reporter with the London, U.K., bureau. He is particularly focused on archaeology and paleontology, although he has covered a wide variety of topics ...