Topic: Steven Amstrup
Greenhouse-gas emissions worldwide must be cut to avoid a disappearance of summer sea ice in the Arctic, which is crucial to the polar bear.
12/15/2010 05:51 pm
Government scientists patrolling the skies off Alaska's northwest coast say they observed nine polar bears swimming in open water, prompting some environmentalists to raise concerns about the species' survival in a warming world.
08/22/2008 01:00 am