A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

In the intervening three and a half decades, paleontologists have uncovered countless new species, adding diversity to existing families and revealing entirely new ones. For the most part, they fall ...

Cat-loving paleontologist answers your questions in the National Museum of Natural History’s YouTube series, “The Doctor Is In.” Anna Torres Smithsonian paleontologist, Hans Sues, answers your ...

For decades, paleontologists have debated whether dinosaurs were warm-blooded, like modern mammals and birds, or cold-blooded, like modern reptiles. Knowing whether dinosaurs were warm- or ...