Why penguin-eating pumas live closer together in Patagonia, the reason chimps can reason, ants sacrifice individuals for the ...

Penguins, it seems, can't really taste their dinners. They aren't able to pick up on sweetness, bitterness, or a meaty flavor known as umami, a study finds. Instead, they can only taste sourness and ...

A natural experiment in a national park in Patagonia shows how the return of a large predator can reshape an ecosystem.