Sloths weren't always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense claws. Video above: ...

Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge – up to 4 tons – and when startled, they brandished immense claws. For a long time, scientists believed ...

International research and highly-specialized divers are bringing an underground, underwater world to the surface ...

“Prehistoric Planet: Ice Age” is the greatest doc I’ve seen since the BBC’s sensational “Blue Planet 2,” which first hit ...

Pigs, rats, cats and mongooses, all brought to the island decades earlier by humans, were to blame for their demise, preying ...

Near Palm Springs, California, Joshua Tree National Park is a protected desert expanse named for its signature yucca plant ...

Early fall is my favorite time of the year with crisp days, sunshine, and the splashes of color everywhere as the trees start ...

In recent years, curious finds by quarry workers in gravel pits near Grunthal have led to some remarkable discoveries about ...

Cave bears smash lion skulls, saber-cats starve in silence, and the ice begins to melt. Five episodes of jaw-dropping beauty later, the series leaves you staring at the brutal question about climate ...

Scientists analysed oxygen isotopes locked inside the minerals. These isotopes shift according to climate at formation.

A sloth attacked a corncob with uncharacteristic speed and vigor at the Cincinnati Zoo, footage posted on December 7 ...

The nature documentary series uses new research and photorealistic CGI to bring the huge, bizarre animals of the Ice Age back ...