Add Yahoo as a preferred source to see more of our stories on Google. An artist's interpretation of mammals that lived during the last Ice Age. Fossils from similar species of an armadillo-like ...

Limestone mesas dominate the foreground, the pale strata angling skyward above what, even by West Texas standards, is a rough dirt road. Above the mesas, higher still, is the Sierra Vieja, red ...

A hidden source of Ice Age history has turned up at a water-filled cave in Texas, where a paleontologist discovered dozens of ancient fossils. Water caves throughout the state, home to active ...

The animal bones were found alongside stone tools possibly crafted by humans. The researchers say the treasure trove holds clues to the Caribbean's earliest inhabitants. “I couldn't believe my eyes as ...

The Smithsonian's National Zoo is home to three Linnaeus's two-toed sloths and shares some sloth basics, but here are three lesser-known sloth facts. 1. The Smithsonian has a collection of fossilized ...

"Some 80 types of sloths have existed across 50 million years, and we're left with just two species today." On Hispaniola, scientists previously found six or seven species of ancient sloths. Evidence ...

Deep in the unyielding darkness of a Brazilian cave, a pale, blind, spiny beast carefully feels its way across rust-colored rocks. Meet Paleotoca diminas, a spider new to science. The species, ...

Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are primarily what drove the wide difference in size between sloth species.