Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...

A new road being built led to the bones of two giant ground sloths being discovered in Wilmington, launching them into local ...

Deep beneath the hillsides and suburbs of Brazil, there are tunnels so vast and regular that they look like abandoned subway ...

The energy company’s sponsorship is a reminder of how football feels morally compromised on environmental issues ...

Researchers have discovered fossil human footprints embedded in an ancient lakebed that show humans inhabited North America ...

Paleontologists working in a cave on the Caribbean island of Hispaniola have discovered the first-known instance of ancient ...

National Geographic Explorer Paul Salopek is retracing the path of human migration. More specifically, the scientific ...

Paleontologists have discovered and documented 16,600 footprints left by theropods, the dinosaur group that includes the ...

Entrepreneurs Jeremy and Lila Stewart built Hari Mari into a premium flip-flop brand with purpose—and profit. Now, the ...