Sloths are famous for moving slowly, but that extreme pace has unexpected biological consequences. Because they spend so much time nearly motionless, algae can grow directly in their fur, turning the ...

It's pretty surprising to see a 27-year-old jump into her mother's arms and insist on being held like a baby. At the Sloth Sanctuary outside of Cahuita, Costa Rica, though, such a sight is ordinary.

Rescuers in Venezuela recently saved a sloth trapped on electrical lines, a scene that played out on social media and drew attention to a wider problem plaguing wildlife in the region. The animal, ...