Researchers analyzed fossils and DNA to get a big-picture view of sloth evolution and determine what drove their immense size ...

What comes to mind when you think of the prehistoric world? For many, it is dinosaurs, the fierce and powerful stars of the Mesozoic era, which spanned from about 251 to 66 million years ago.

Massive Megatherium sloths once stood as large as Asian elephants, ripping foliage off treetops with prehensile tongues like ...

May 20, 2025 — A novel analysis suggests more than 3,500 animal species are threatened by climate change and also sheds light on huge gaps in fully understanding the risk to the animal ..

The tough decision of which species to save from extinction Roughly 1 million species of wildlife face extinction worldwide, according to a recent United Nations report. Ecologist and author ...