Whenever we hunt for ancient fossils, something changes inside us. The rocks bring back the same curiosity we felt as kids.

The first dinosaur fossils in North America were discovered in Montana in 1854, as was the world’s first Tyrannosaurus rex nearly a half-century later. With over 75 dinosaur species —including a new ...

Is that an apocalyptic asteroid blazing overhead? What else could explain why some of the nation’s most rip-roaring dinosaur ...

Tiny fossil teeth from Alaska are changing how scientists view mammal life and migration in the ancient Arctic.