A sloth using a rope bridge in Costa Rica.

Sloths are the world’s slowest mammals. They live in the rainforests of Central and South America.

Sloths live their lives in super-slow motion. They spend their days in the treetops, hanging by their toes. It can take them all day to eat one leaf, and a month to digest it. They move so slowly that moss grows in their fur.

Zoologist Rebecca Cliffe studies sloths in Costa Rica. She’s fascinated by these furry slowpokes and their laid-back lifestyle.