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

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

Wildlife conservation efforts in the Patagonia region of Argentina have been so successful that rebounding populations of pumas have found an unexpected new main source of prey: Magellanic penguins.

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 ...