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 ...

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 ...

An illustration depicting a person carving an osteoderm from a giant sloth in Brazil about 25,000 ... “There’s still a big debate,” Ms Pacheco said. Scientists know that the first humans ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting ... “There’s still a big debate,” Pacheco said.

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through ... “There’s still a big debate,” Pacheco said.

Nearly 27,000 years ago, a giant ground sloth traveled across a barren ... "At that depth, we're still getting enough light penetration from the surface that we get an indirect lighting effect ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting ... “There’s still a big debate,” Pacheco said.