Sloths have changed quite a bit in the last ten thousand years. The slow-moving, sleepy, leaf-eating creature we see hanging ...

After the demise of the dinosaurs following an asteroid strike 66 million years ago, mammals became Earth’s dominant land ...

For the first time in three years, Reynardo, the Birmingham Zoo’s Hoffmann’s two-toed sloth can be seen by the public. The beloved 35 year-old sloth, who has been a resident at the Birmingham Zoo ...

Q. I saw the following quote on a poster at a wildlife sanctuary in Florida: “Cranes are large birds with long beaks found on ...

The larger sloths didn’t do much tree climbing, at risk of falling to their deaths. Instead, they survived by being ...

Climate change may contribute to a northerly range expansion of the biting midges that carry the oropouche virus.

The extinct mammals were about five times larger than a grizzly bear–and filled caves with their poop.

A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.

An analysis of the sloth family tree suggests three different groups of the animals evolved to gigantic sizes in response to ...

Llamas, alpacas, vicuñas, and guanacos in South America are being hailed as heroes of the high plateaus for their resilience to harsh environments and climate change, as well as their cultural, ...

Sloth size and habitat shifted multiple times over the past 35 million years, but human hunting likely drove the slower, ...