If you can't see where you're going, you can't run around because you're going ... Thanks to rare extra vertebrae in its neck, the three-fingered sloth can turn its head 270 degrees, which allows ...

Three-toed sloths also have an advantage that few other mammals possess: They have extra neck vertebrae that allows them to turn their heads some 270 degrees.

"They call them the sloths of the Cretaceous period," said University of Calgary paleontologist Darla Zelenitsky. "Totally ...

Sloth bears have "rough, unruly hair" around the ears, shoulders and neck, with pale muzzles and flexible noses. Sloth bears also often have white patches on their chests, in the shape of a Y ...