The fossil discovered at Sea-Tac Airport is at the Burke Museum, and named for the man who first came across it. Nearly 60% ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

Thaís Pansani holds a giant sloth rib bone from central Brazil dated to about 13,000 to 15,000 years ago, which is thought to be burned by human-made fire, in the Smithsonian's National Taphonomy ...

Roughly half a million years ago, a group of armadillo-like mammals, horses, and sloths met their end in a sinkhole in what ...

An illustration depicting a person carving an osteoderm from a giant sloth in Brazil about 25,000 to 27,000 years ago (Julia d’Oliveira via AP) Sloths were not always slow-moving, furry tree ...

Molecular dating has shown that several extinct creatures, such as giant sloths and mammoths, survived in South America much later than previously thought, raising questions about the root causes ...

SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense ...

Sloths were not always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to four tonnes — and when startled, they brandished immense claws. For a long time, scientists ...

He and other researchers suspect that the scars were carved by giant ground sloths that roamed the region until they went extinct more than 10,000 years ago. “This is an archaeological and ...