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 researchers ...

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 international ...

A new study challenges decades of scientific opinion concerning the evolutionary relationships of tree sloths and their extinct kin. Scientists have solved the evolutionary puzzle of how sloths went ...

Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are primarily what drove the wide difference in size between sloth species. But ...

When you picture the jungle, your mind might jump to roaring tigers, monkeys swinging wildly from tree to tree, or bright ...

Look closely up in the trees of a shade-grown cacao plantation in eastern Costa Rica, and you’ll see an array of small furry faces peering back at you. Those are three-toed sloths that make their ...

Sloths are fascinating creatures known for their slow movements and their almost entirely arboreal lifestyle. These sluggish mammals spend the majority of their lives hanging from the branches of ...

Two groups of sloths are left on Earth now — two- and three-toed sloths — but there are more that have existed in the Americas throughout history. Some are small creatures that lived up in the trees, ...