Snowflake, a 21-year-old female polar bear at SeaWorld San Diego, is set to be shipped to the Pittsburgh Zoo for breeding, and PETA is objecting.

Polar bears need the ice to hunt and as it vanishes they can no longer reach their traditional prey. With each Arctic summer providing more water and less ice, some polar bears are forced to try ...

The polar bear, once king of the North, needs ice to stalk its prey. Killer whales, or orca, on the other hand, are unable to hunt in an ocean locked in ice.

In the frigid waters of the Arctic, two of nature’s most fearsome predators,the Orca and the Polar Bear,come face to face in an unforgettable battle for survival. Orcas, known as "killer whales ...

Along with lions, crocodiles, and killer whales, polar bears are apex predators — meaning they’re at the top of the food chain, with no natural predators of their own to worry about.

Although classified a marine mammal, the polar bear is not adapted to hunting in the water. And it is certainly no match for the world's greatest aquatic hunter - the killer whale.

They found bowhead whale carcasses were increasingly becoming more common in polar bear diet potentially linked to killer whales venturing further north and staying for longer periods of time.

What do killer whales, polar bears and humans have in common? They are adaptable predators with the ability to select new prey when their favourite food is in low supply. But this change can ...

The annual great beluga migration is underway, but the whales are facing increasing dangers as the climate warms and human activity decimates their habitat.

In this latest installment of the “Climate Diaries” series, CBS News correspondent Mark Phillips is in Antarctica, following a group of researchers chasing killer whales. They are using new ...

Biologists have a qualitative understanding of bioaccumulation in top predators such as bald eagles, killer whales, and polar bears but not a good explanation of how it happens, says Melissa A ...

Polar bears face yet another threat to their survival: sharks Killer whales and Greenland sharks could attack polar bears as well as eat their prey - seals.