New research shows 8,000-pound sloths once dug caves, adapted to oceans, and roamed widely—until climate and humans brought ...

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

Explore how ancient sloths evolved in size, from small climbers to massive ground dwellers, shaped by shifting climates and ...

Most people are familiar with modern sloths — slow-moving, tree-dwelling mammals that digest food slowly and descend only ...

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

The sloth family tree once sported a dizzying array of branches, body sizes and lifestyles, from small and limber tree climbers to lumbering bear-sized landlubbers. Why sloth body size was once so ...

Ground sloths varied widely in size, from the truly massive Megatherium — which could rip foliage off the tops of trees with its prehensile tongue and acted as a sort of ecological stand in for ...

Ground sloths had a special fondness for caves, and their size undoubtedly played a role in their ability to find and make shelters. The moderately sized Shasta ground sloth favored small ...

The National Park Service says there are two different kinds of ground sloths, and the bones found in the construction site are likely remnants of the Shasta Ground Sloth or Nothrotheriops shastensis.

Photo Courtesy of Texas Department of Transportation According to the National Park Service, there are two giant ground sloths, but due to the location of the bones, it’s likely these are remnants of ...