A wildlife biologist was flying over the Arctic on a routine whale survey when his team spotted dead polar bears in the water. The researcher's report on the observations raised public alarm about the threat of climate change, he's now under an official investigation. Above, a polar bear walks on the frozen tundra on the edge of Hudson Bay on Nov. 14, 2007.
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Students leave after the day's classes at Emma Hutchinson School, which has been identified as one of 44 schools involved in a test cheating scandal. Investigators have concluded that nearly half the city's schools allowed cheating to go unchecked for as long as a decade, beginning in 2001.
Former Michigan State football player Charles Aaron "Bubba" Smith raises his arms during a 2006 ceremony at which his jersey number was retired. Smith died at his home in Los Angeles on Aug. 3.