Ancient sloths ranged in size from tiny climbers to ground-dwelling giants. Now, researchers report this body size diversity was largely shaped by sloths’ habitats, and that these animals’ precipitous ...

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.

Pleistocene ground sloths constitute a remarkable and diverse group of xenarthran mammals that thrived across South America during a period of significant climatic and environmental flux. Their fossil ...

Sloths, the famously slow-moving yet adorable creatures native to Central and South America, could face extinction by the end of the century due to climate change. Researchers investigating how sloths ...

Recent excavations in South America have unearthed a fascinating glimpse into the prehistoric world, revealing the existence of giant, elephant-sized sloths that once carved massive, 2000-foot-long ...

Photo via Toucan Rescue Ranch. Sloths are some of the most interesting animals to have ever graced the earth, and yet they remain quite the unknowable little critters. The group that contains sloths, ...

The Smithsonian's National Zoo is home to three Linnaeus's two-toed sloths and shares some sloth basics, but here are three lesser-known sloth facts. 1. The Smithsonian has a collection of fossilized ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Everybody loves sloths, and whenever we talk ...

The survival of sloths is under threat due to climate change, according to a new study. The famously slow-moving — and adorable — creatures of Central and South America could die out if temperatures ...