Add Yahoo as a preferred source to see more of our stories on Google. Evolution rarely hits delete. Instead, it leaves behind ...

The groundwater flowing through the subterranean cave systems of central Texas are vital for both farming and daily life.

The largest sloth of all time was the size of an elephant. Known to paleontologists as Eremotherium, the shaggy giant shuffled across the woodlands of the ancient Americas between 60,000 and five ...

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. Most of us are familiar sloths, the ...

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

Learn about the assemblage of fossils discovered at a water cave in central Texas, shedding light on Ice Age megafauna that ...

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 ...

A Manatee County utilities crew was digging a trench recently when it unearthed something unexpected: a fossilized giant ground sloth claw that had been buried in more than 11,000 years ago. According ...

Sloth Month? Now there’s something we can (very slowly) get behind. This winter, the Children’s Natural History Museum in ...