A cooling, drying climate turned sloths into giants – before humans potentially drove the huge animals to extinction. Today’s sloths are small, famously sluggish herbivores that move through ...

“Some call sloth babies ‘pups,’ ‘infants,’ or even ‘slow-bies,’” the zoo said in a news release. “Everyone can agree to call this wee one ‘adorable.’” The baby does not yet ...