Science and technology

Associated Press
This Aug. 26, 2003 image made available by NASA shows Mars photographed by the Hubble Space Telescope on the planet's closest approach to Earth in 60,000 years. Mars is set to get its latest visitor Sunday, Aug. 5, 2012, when NASA's new robotic rover, named Curiosity, attempts to land there. Mars has been a prime target for space exploration for decades, in part because its climate 3.5 billion years ago is believed to have been warm and wet, like early Earth. (AP Photo/NASA)

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