Assignment Earth: Beetles destroy pines in the Rockies
May 6, 2010, 5:32 p.m. by Meredith Darlington
Video: Beetles are killing countless whitebark pine trees, a major source of food for wildlife, including grizzly bears.
What do you get when you cross a polar bear with a grizzly?
November 2, 2009, 7:34 p.m. by Katy Rank Lev
German zoo features rare hybrid species, but there are only 17 confirmed animals in existence.