They also estimated the bird’s weight to be 156 kilograms, about that of a giant panda (Ailuropoda melanoleuca), which would ...

Analyzing a leg bone from a fossil site in Colombia, scientists have identified a massive “terror bird” that lived about 12 ...

The mostly flightless, meat-eating dinosaur descendents were the size of dogs at their smallest, but the largest known ...

Terror birds were apex predators some 12 million years ago in South America. A newly published discovery could be the largest ...

The fossilized leg bone of the terror bird went unidentified for almost 20 years. Nearly 12 million years ago, the largest ...

The bone, described two decades after its discovery, suggests the species might have grown up to 20 percent bigger than other ...

While past terror bird fossils placed the meat-eating birds at 3 to 9 feet tall, new findings suggest that some were even ...

Researchers including a Johns Hopkins University evolutionary biologist report they have analyzed a fossil of an extinct ...

Millions of years ago, long-legged, big-beaked, meat-eating “terror birds” stalked the Americas. The imposing creatures ruled the roost as top predators of their ...

In Colombia, a fossil-collecting rancher has found a giant, flightless killer from 13 million years ago — and a missing link ...