At age 75, Vadevino Alano keeps up a brisk pace as he strides through the forest on the way to the Armadillo’s Den — a spectacular cave in southern Brazil. When he reaches the cave’s opening, Alano is ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through ... with the end of the last Ice Age, a time when an ice-free ...

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 ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through ... with the end of the last Ice Age, a time when an ice-free ...

An illustration depicting a person carving an osteoderm from a giant sloth in Brazil about 25,000 ... to coincide with the end of the last Ice Age, a time when an ice-free corridor likely emerged ...

This illustration provided by researchers depicts a person carving an osteoderm from a giant sloth in Brazil about ... coincide with the end of the last Ice Age, a time when an ice-free corridor ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through ... with the end of the last Ice Age, a time when an ice-free ...