Ahead of a road construction project in Lubbock, Texas, the state's Department of Transportation sent archaeologists to ...

Today, sloths are slow-moving, tree-dwelling creatures that live in Central and South America and can grow up to 2.5 feet ...

A prehistoric discovery near Hays is shedding some new light on a giant ground sloth species that lived more than 10,000 ...

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

Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big.

According to a news release from TxDOT, an archeological survey in Lubbock unearthed the bones of prehistoric animals called ...

During an environmental review for Loop 88 construction, officials discovered large, prehistoric animal bones, including a ...

They had “very large claws on their forelimbs” and were “covered in thick hair,” the Illinois State Museum said.

Archaeologists in Texas recently discovered prehistoric megafauna bones, including a giant ground sloth, during a highway ...

Sloths have a reputation for being sluggish and slow, spending most of their lives dozing in trees, but a new study suggests ...

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.

A giant wound opened up between ... Long after their ground-dwelling relatives had gone extinct everywhere else, two species of tree sloth in the Caribbean held out until 4,500 years ago.