An ancient and enormous organism called Prototaxites, initially found to be a type of fungus, may actually be an unknown ...

Cheetahs vanished from Saudi Arabia half a century ago. Now long-dead mummified big cats may help herald their return.

Mice that experience the real world may be better models for human mental health conditions, compared with lab mice that never leave their cages, a study hints.

Researchers have identified ginkgo-toothed beaked whales alive at sea for the first time after years of searching, and in doing so solved the mystery of an odd echolocation pulse in the North Pacific.

A video has revealed never-before-seen behaviors in wolves that could mark the first case of tool use in a wild member of the wolf and dog family — and it was all for some crab bait. When you purchase ...

Following Jane Goodall's death, chimp experts explain how her early observations still influence our understanding of our ape cousins. When you purchase through links on our site, we may earn an ...

Scientists recently discovered a new species of green anaconda in the Amazon rainforest. A new Nat Geo series shows the ...

A clip from the upcoming series "Prehistoric Planet: Ice Age" shows how iconic ice age creatures adapted to their changing environment as temperatures rose and ice sheets started to melt. When you ...

Scientists with the Norwegian Orca Survey and Orca Channel have documented, for the first time and in astounding detail, the birth of an orca and the newborn's first hour. When you purchase through ...

Chimpanzees use a variation of the "scientific method" — discarding prior beliefs if convincing new evidence comes along to change their minds, research shows. When you purchase through links on our ...

A new study reveals an unknown species of whiplash squid burying itself upside down in the deep sea — a first-of-its-kind behavior for cephalopods. When you purchase through links on our site, we may ...

Researchers have found footprints of large, bone-crushing dogs in the 12 million-year-old Ashfall Fossil Beds in northeastern Nebraska, suggesting these large carnivores may have survived a ...