Take a peek at the world's slowest mammal, so sedentary that algae grows on its furry coat. Read on to learn about life in ...

Three-toed sloths have a symbiotic relationship with moths and algae. Sloths are the quintessential couch potatoes of the rainforest, and these sluggish tree-dwellers also serve as a hotel for ...

The sloth, named Fezzik after a character in The Princess Bride, is 10 years old and arrived from Milwaukee County Zoo.

Scientists have solved the evolutionary puzzle of how sloths went from enormous ground-dwelling giants to the small, famously-laidback tree-climbers of the modern day. The study, by an ...

The sloth was caught on camera by a GoPro propped in a tree in Nicaragua. — -- A sloth spotted in the wilds of Nicaragua by an American tourist was just trying to take a nap, but first, it ...

New research on the evolutionary relationships between tree sloths and their extinct giant relatives is challenging decades of widely accepted scientific research. A team of international ...

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 ...

Sloths, known in Spanish as los perezosos ("the lazies"), have evolved adaptations to the constraints of life in the trees. Two-toed sloths have relatively large home ranges and consume a varied ...