We humans couldn’t live without our gut microbes, but not all animals rely on microscopic digestive communities like we do.

A new study comparing 59 species of primates linked same-sex sexual behavior to scarce resources and more predators in socially complex species. The findings show diverse sexual behaviors are common — ...

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

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 ...

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 ...

Rock climbers in Italy stumbled across evidence of what appears to be a sea turtle stampede that took place nearly 80 million ...

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 ...

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 ...

From sinking boats and feasting on shark livers to dining on whale tongue and tossing porpoises around for fun, orcas are displaying some fascinating — and sometimes terrifying — behaviors. When you ...

Scientists recently discovered a new species of green anaconda in the Amazon rainforest. A new Nat Geo series shows the moment they encountered this snake in the wild. When you purchase through links ...

After researching the rodent indent, scientists are over 98% sure it came from a squirrel. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A ...