A newly discovered winged raptor may have belonged to a lineage of dinosaurs that grew large after losing the ability to fly. But being grounded likely didn't stop this sickle-clawed killer from ...

Thought to have been feathered, the Dakotaraptor's powerful legs and "sickle claw" gave it an advantage some 66 million years ...

SIOUX FALLS, S.D. >> Tyrannosaurus rex may have been known as the big guy around the Hell Creek Formation 66 million years ago, but a newly discovered species of raptor would have roamed nearby as one ...

SIOUX FALLS, S.D. — Tyrannosaurus rex may have been known as the big guy around the Hell Creek Formation 66 million years ago, but a newly discovered species of raptor would have roamed the region as ...

But before we get too carried away and start commissioning murals of giant raptors slashing the flesh of Tyrannosaurus Age of Reptiles style, it’s worth thinking about what the world of dinosaurs was ...

Getting your Trinity Audio player ready... SIOUX FALLS, S.D. — Tyrannosaurus rex may have been known as the big guy around the Hell Creek Formation about 66 million years ago, but a newly discovered ...