1. Polar Bears Resort to Cannibalism as Arctic Ice Shrinks
... shortly after she had given birth. In the wild, polar bears do kill each other for population regulation, to exert their dominance, and to gain reproductive advantage. But killing one another for food is much less common. Steven Amstrup, of the U.S. Geological Survey Alaska Science Center, says that "During the 24 years of research on polar bears in the southern Beaufort Sea ... extinction of polar bears before the end of the 21st century. The Center for Biological Diversity of Joshua Tree, CA, petitioned the federal government in 2005 to list polar bears as "threatened" under the Endan...
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