Sloths once roamed the Americas, ranging from tiny, cat-sized animals that lived in trees all the way up to massive ground sloths that may have weighed up to six tons. The only species we know and ...

Here’s your excuse to sloooooowwww dowwwnnnn this Friday: It’s International Sloth Day. To celebrate the holiday, we compiled 9 things to know about the sluggish tree-dwellers, according to the World ...

Sloths are typecast for being slow. But while sloths are a bit sluggish compared with most mammals, that is hardly their only noteworthy trait. Here are a few other things worth knowing about sloths.

The Sloth Conservation Foundation, created by British zoologist Rebecca Cliffe, is working to preserve the future of the world’s slowest mammals in Costa Rica. The group is building rope bridges to ...