For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...

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 ...

Sloths were not always slow-moving, furry tree-dwellers. Their prehistoric ancestors ... to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many ...

SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers ... to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive ...

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 ...

This illustration provided by researchers depicts a person carving an osteoderm from a giant sloth ... SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers.

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 ...