This photo provided Wednesday, July 20, 2011 by the Chicago Zoological Society, shows Aussie, a 26-year-old polar bear, keeping cool with an ice block filled with some of his favorite treats, ... more 
This photo provided Wednesday, July 20, 2011 by the Chicago Zoological Society, shows Aussie, a 26-year-old polar bear, keeping cool with an ice block filled with some of his favorite treats, including fruit and nuts, at the Brookfield Zoo in Brookfield, Ill. Much of the United States is experiencing miserable temperatures in the mid-90s to low 100s and heat-index levels well above 100 degrees. (AP Photo/Chicago Zoological Society, Jim Schulz) less 
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Associated Press | Photo By Chicago Zoological Society, Jim Schulz
Wed, Jul 20, 2011 3:28 PM EDT