Paleontologist Thaís Pansani standing in front of a reconstructed giant ground sloth skeleton at the Smithsonian National Museum of Natural History. AP SAO PAULO (Associated Press) — Sloths weren’t ...

Millions of years after the last dinosaur roamed the earth, a new generation of killer animals rose to power. The Eocene, between 56-34 million years ago, was ruled not by killer reptiles but by a new ...

Paleontologist Thais Pansani stands in front the reconstructed skeleton of a giant ground sloth at the Smithsonian National Museum of Natural History in Washington, D.C., on July 11. The Associated ...

Prehistoric animals are often pictured as distant fossils, yet a surprising number of species still walk, swim, and crawl across Earth with body plans that echo deep time. Strictly speaking, ...

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There’s unique, and then there’s the pangolin. These incredible creatures resemble something from prehistoric times with their protective suit of armor. However, it isn’t just how they look that sets ...