The news that the frigid Arctic tundra ringing the polar region has switched ... rate and increase the magnitude of global ...

However, in the tundra they fear nothing. The bear is the master, and it never turns back," he said. In winter, polar bears do ... I can explain it by the global warming. Their penetration into ...

Photographer Paul Nicklen and I are on a mission to capture images that ... suspect polar bears will be driven to extinction in the next century. He wondered whether the global population of ...

Two-thirds of the world's polar bears could be extinct by 2050 if greenhouse gas-fueled global warming keeps melting their Arctic sea-ice habitat. The Center has led the charge to save polar bears ...