A natural experiment in a national park in Patagonia shows how the return of a large predator can reshape an ecosystem. Long absent from Argentinian Patagonia due to over-hunting, pumas have returned ...

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

This fossil is 13 million years older than any ant fossil found before—and reveals a sophisticated predator that lived alongside the dinosaurs. The hell ant existed over 100 million years ago, ...

For 162 million years, sturgeons have fended off everything they’ve faced. Now scientists are racing to save these living fossils. The white sturgeon is the largest freshwater fish in North America; ...

Picture an animal that huddles up with others when stressed, babysits its young, hangs out around relatives, and gathers in big groups every year. Did you imagine a rattlesnake? For a long time, ...

Webs can be decorated with decoys, fine-tuned like guitars—and hold secrets about evolution. A Cyclosa spider is camouflaged on a web with debris attached to make itself less visible at the Los Amigos ...

Walking more is associated with reduced risk for dementia, diabetes, heart disease, and more—but a new study says you can get fewer than 10,000 steps a day and still see all those benefits. An ...

Listening to our animal kin — some experts predict that the capacity and technology to understand and talk back to non-human ...

From an elusive jaguar to an industrious beaver, photographers captured iconic animal moments around the world. While monitoring the burrow of a rare giant armadillo in Brazil’s Atlantic Forest, ...

Hundreds of cats, from purebreds to rescues, competed for glory at the world's largest cat show in Cleveland, Ohio. A cat owner from Mithra Cattery gives her Persian cat a massage after a long day at ...

The crackle of a campfire beneath a star-studded sky; the scent of cedar in old-growth forests; the thunder of a packed ...

Move over, Game of Thrones—ants can turn armies against their leaders and use subterfuge to take over entire kingdoms, too. This chilling discovery did not originate with a professional scientist, but ...