Fossilized footprints and tracks dating back 50 million years ago discovered at the John Day Fossil Beds National Monument could provide new insight into how prehistoric animals lived in Oregon. The ...

Not every space traveler has worn a suit or walked upright. From monkeys to microscopic marvels, these species show how far ...

The plains viscacha looks a lot like a chinchilla, but it's known for building vast tunnels underground and for producing ...

In a remarkable find in Utah, paleontologists uncovered a new dinosaur species, Fona herzogae, that lived during the ...