The objects suggest that humans entered South America thousands of years earlier than previously thought.

Although it sounds like a grade-B science fiction movie, fossils show that our ancestors once hunted and fought giant ground sloths. For the first time, scientists have uncovered fossilized footprints ...

Researchers have discovered the world's longest trail of fossilized human footprints at White Sands National Park, New Mexico.

Imagine waking up to headlines announcing that one of the largest mammals to ever roam the Americas has returned. After ...

Who killed the giant ground sloth? Or the mammoth and sabre-toothed cat, come to that. Was it humans or a natural event, like the end of the last ice age? The question is endlessly debated. But the ...

Imagine a sloth. You probably picture a medium-sized, tree-dwelling creature hanging from a branch. Today's sloths—commonly featured on children's backpacks, stationery and lunch boxes—are slow-moving ...

A cooling, drying climate turned sloths into giants – before humans potentially drove the huge animals to extinction. Today’s sloths are small, famously sluggish herbivores that move through the ...

Add Yahoo as a preferred source to see more of our stories on Google. Massive Megatherium sloths once stood as large as Asian elephants, ripping foliage off treetops with prehensile tongues like today ...

Add Yahoo as a preferred source to see more of our stories on Google. The remains of an Ice Age era animal have been unearthed in Lubbock during the ongoing road construction project for Loop 88. Due ...