No predator today can catch the American pronghorn, yet it runs as if something still chases it. Scientists trace this ...

Imagine a sloth. You probably picture a medium-sized, tree-dwelling creature hanging from a branch. Today's sloths—commonly ...

For years, scientists thought Antarctica was the main source of meltwater that flooded the planet's oceans after the last ice age. But new research has flipped that story, and it has major ...

Approximately nine centuries ago, Indigenous Americans demonstrated remarkable engineering and logistical capabilities by ...

New research in a North American “mummy zone” in eastern Wyoming reveals how giant duck-billed dinosaurs were preserved in ...

Tucked away in the northwest corner of Kansas is a place where time stands still, a thriving ode to small-town America.

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed ...

Do you believe that life exists on other planets? Well, here's an even more mysterious idea: Have you ever considered that ...

New research has identified a dinosaur "mummy zone" in a series of ravines near Lusk, Wyoming. It's produced two mummies of a fleshy dinosaur with ...

Federal authorities said 14 people, including immigrants and demonstrators, were arrested in Tuesday’s operation.