Students take China's national college entrance exam, the gaokao, last year in Hami, Xinjiang Uygur Autonomous Region. Educational experts say the all-important test is at the heart of the Chinese educational system's emphasis on rote learning and memorization.
Maria Luisa Aragon was killed in Juarez, Mexico, on Dec. 9, 2009, in a case of mistaken identity. She is among the 30,000 victims of Mexico's brutal drug war.
Courtesy of the Aragon family
The inner four planets of the Gliese 581 system orbit the host star, a red dwarf 20 light-years from Earth, in this rendering from a National Science Foundation artist. The planet in the foreground has a 37-day orbit and, like Earth, is far enough from the star for liquid water to exist.
Lynette Cook/via NASA
Bud Greenspan poses for a portrait during the USOC Olympic Media Summit on Oct. 10, 2005, at the Antlers Hilton hotel in Colorado Springs, Colo. Greenspan, 84, died on Christmas Day of complications from Parkinson's disease.
Matthew Stockman/Getty Images