Polar Bears

New data overturns thinking on polar bear ancestry

Scientists are at a loss to explain the animals' odd fur loss.

A wildlife biologist in Alaska is suspended, but no one is saying why.

Melting sea ice is increasing polar bear cubs' mortality rates because their mothers are forced to swim longer distances in search of steady ice or land.

Warmer temperatures from climate change are forcing polar bears to swim longer distances to find stable sea ice.

Modern polar bears all seem to share some genes. It just so happens these genes come from an Irish brown bear living over 20,000 years ago.

An autopsy of the young bear showed distinct changes in its brain.

Here's a look at the cute furball, a polar bear named Knut.