Polar bears are now adding new foods to their diet, including reindeer, walruses and bird eggs ...

A population of bears in Norway’s Arctic is confounding scientists’ expectations, getting fatter and healthier even as the sea ice melts rapidly.

The finding offers a small window of hope for a polar bear population vulnerable to the effects of climate change.

Each year, the burly bears of Katmai National Park and Preserve capture global attention in a March Madness-style bracket challenge as fans pick which bear advances in each round. “The bears have been ...

Trees of all sizes across the Amazon rainforest are getting fatter due to climate change, a new study shows. Rising carbon dioxide (CO 2) concentrations in the atmosphere have created a more ...