Bear Science

Otis the bear is one glorious half-ton of fur and blubber, and for the second year in a row, he's the winner of Katmai National Park's Fat Bear Championship.

Bear rehabber Kathleen Ramsay has rehabilitated hundreds of bears—orphaned, sick, hit by cars. Under her care, they get another shot at growing up.

How much do really know about our furry neighbors? Take our bear quiz and find out.

A warming climate is transforming grizzlies' diets. Will it endanger their future?

How to snag a dream job researching this majestic mammal.

A fight is brewing over the country's most endangered bruin.

Can a rare breed of highly trained, Russian-bred dogs help keep hikers—and bears—safer? Land managers around the country are betting on it.

Reintroducing the big bear makes more than just ecological sense: We should be freaked out in the woods sometimes.

The agency's decision to euthanize a problem bear last year angered some, but NPS biologist Kerry Gunther says it was the right call. Here's why.

But they rarely show it.

Welcome to Yosemite, iconic American landscape, hikers' paradise, and all-you-can-eat home of the wiliest bruins on earth.