The first paleontological study of its kind is challenging what we thought we knew about the state’s natural history.

Sloth Month? Now there’s something we can (very slowly) get behind. Paramylodon harlani was not like today’s cutesy tree ...

They’re slow, they’re sleepy, and they’ve taken over the internet—but sloths are more than just cute animals hanging from ...

A 400,000-year-old giant sloth femur was discovered in Argentina, preserving rare muscle marks that reveal how these Ice Age ...

Buried beneath the hills of southern Brazil and northern Argentina, scientists have discovered massive tunnels that were likely dug by giant Ice Age creatures. These tunnels, which stretch up to 600 ...

The gender of the newborn is still undetermined, and the name of baby is still undecided, but it appears to be healthy, and the family is doing great,” the zoo announced.

Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

About 50 residents of a community outside Chile’s capital spent Saturday trying their best to power an entirely human-operated chatbot that could answer questions and make silly pictures on command, ...

Two sloth bear cubs were born at the National Zoo, which appears to be good news for this vulnerable species and perhaps bad news for the termites on which they dine. The births, which occurred Dec. 7 ...

The National Zoo has welcomed two newborn sloth bear cubs. The cubs are healthy and will remain off exhibit until spring 2026. Sloth bears are vulnerable in the wild, making the births important for ...