Beneath the streets of Los Angeles lies one of the most prolific fossil sites in the world. At the La Brea Tar Pits, millions of fossils including giant sloths, dire wolves, saber-toothed cats, and mammoths have surfaced from ancient asphalt, offering a r...

Excavators at the La Brea Tar Pits and Museum work to dig up fossils of mammoths, dire wolves, giant sloths and more out of the ground.