New research painted a more accurate picture of the megafauna that spread widely around the Americas before they went extinct ...

The giant ground sloths thrived during the Late Pleistocene era, around the same period when many now-extinct megafauna existed, such as mammoths and saber-toothed cats. The fossil provides ...

A bioscience company’s announcement this week that it’s brought back long-extinct dire wolves raised a lot of eyebrows. But ...

Unlike now, most extinct sloths lived on the ground and some were many times larger than modern tree sloths. Mylodon darwinii is the scientific name for a species of extinct giant ground sloth. On ...

An illustration shows what Duonychus tsogtbaatari might have looked like. Unlike its therizinosaur brethren, the new species ...

The extinct giant ground sloths were some of the only mammals that had digestive systems large enough to process the huge avocado seeds whole. They feasted on the fruit and then dispersed the ...

On Wednesday, the Santa Cruz Museum of Natural History announced that it's now in possession of a prehistoric left arm bone belonging to a Jefferson’s ground sloth (Megalonyx jeffersonii ...

Ancient ground sloths, officially called Eremotherium ... It's also a clue that when giant sloths did eventually go extinct - some 12,000 years after this particular sloth lived - it was probably ...