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

Mountain lions are adapting to their defenseless, predictable prey, which return to Patagonia seasonally to nest and breed, ...

Penguins do not react to people the way most wild animals do. When a human appears on an Antarctic shoreline, many penguins ...

Penguins in the coastal steppes of Argentina have a new enemy to worry about: the increasing numbers of pumas in Monte León ...

Pumas in southern Patagonia have discovered an unexpected new food source in the dense colonies of Magellanic penguins, and ...

In a national park in Patagonia, something remarkable is happening between predators and prey: Pumas are returning—and ...

When ranchers drove out the pumas, colonies of penguins moved in. Now, the returning pumas have learned to eat these ...

The cats’ new nutritional source in southern Argentina has led to increased concentration of the predators, who have also ...

These playful birds with different personalities cleverly steal stones from others' nests, carefully assessing a situation and adjusting their behavior accordingly.

On Antarctic ice, movement itself becomes a survival test, especially for an animal that spends months walking far inland to ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Although a single penguin is capable of devouring thousands of krill ...

Pumas in Patagonia, Argentina are eating penguins in a national park — and it's changing how the big cats are interacting with each other.