Prehistoric animals once roamed — and ruled — planet Earth. Some of them, like the giant sloth or the woolly rhino, were generally gentle. Others, like the saber-toothed tiger and the dire ...

When a giant fossilized claw was discovered in West Virginia in the late 1700s, there was great excitement over what extinct animal it could have belonged to. Before becoming president ...

Megalodon may have been up to 80 feet long, but the colossal extinct shark was also probably thinner than scientists ...

Early human migration timeline into South America has stirred debate. Researchers have long argued about when these first ...

Unique creatures, odd animals and new species are discovered across the ... Published Feb. 28 | Read More | Prehistoric ‘gentle giant’ — nearly 23 feet long — found in Argentina. See new species ...

Extremely rare fossil of an ancient scorpion unearthed at China's Jehol Biota. The scorpion would've been a key species in the Cretaceous ecosystem, scientists say.

was a member of the research team that first reported the discovery of the giant otter’s fossils in January. Besides providing insight into S. melilutra, the new study raises general questions about ...

Prehistoric Earth was a terrifying place ... Quetzalcoatlus, one of the largest known flying animals, lived around 70-65 million years ago. With a wingspan exceeding 30 feet (9m), it soared over what ...

Fifteen million years ago, now-extinct species of dolphins ... Still, Shimada’s findings on how giant sea animals’ size affect their speed could help us better understand the evolution ...