Today, sloths are slow-moving, tree-dwelling creatures that live in Central and South America and can grow up to 2.5 feet long. Thousands of years ago, however, some sloths walked along the ground, ...

Credit: Getty Images We all know that sloths are famously slow, and part of the reason is their muscle. They have about half the muscle mass of other animals their size, which makes walking almost ...

BOURNEMOUTH, England (Reuters) - Scientists have uncovered evidence of ancient humans engaged in a deadly face-off with a giant sloth, showing for the first time how our ancestors might have tackled ...

Stone Zoo in Stoneham, Massachusetts, is welcoming the facility’s newest – if not the slowest – member of the animal community. The Linne’s two-toed sloth pup, whose gender is not yet known, was born ...