French photographer Emmanuel Tardy's image of a sloth clinging to a post in Costa Rica is one of the images from the 2025 ...

A Manatee County utilities crew digging a trench for a waterline discovered a fossilized claw from a Jefferson’s ground sloth. The fossil dates back to more than 11,000 years ago. The fossil ...

"Some ground sloths also had little pebble-like osteoderms embedded in their skin," notes Narducci, explaining these rocky bumps were a ground-defense trait they shared with one of their closest ...

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

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.

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

A partial skull of a 10-foot-tall ground sloth, Megalonyx jeffersonii, was discovered in Ellis County, Kansas, providing new insights into the animal’s distribution and geological history in … ...

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.