Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

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 ...

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are ...

Sloths may look peaceful and harmless, but their survival strategy is one of the most extreme in the animal kingdom. With incredibly low speed, minimal strength, and almost no way to defend themselves ...

Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big. Most of us are familiar sloths, the ...

Sloths are one of the most beloved and fascinating creatures found in Costa Rica, captivating visitors with their slow movements and endearing expressions. An image of a sloth in its natural habitat ...

Add Yahoo as a preferred source to see more of our stories on Google. Dr. Rebecca Cliffe is a Sloth Conservation Biologist and Founder and Director of the Sloth Conservation Foundation. I've been ...

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 ...