Science and technology

Associated Press
In this frame of a high definition stop motion video taken during the NASA rover Mars landing provided by the space agency on Thursday, Aug. 23, 2012, the heat shield falls away during Curiosity's descent to the surface of Mars on Sunday, Aug. 5, 2012. Curiosity is the first spacecraft to record a landing on another planet. The six-wheel rover arrived on Aug. 5 to begin a two-year mission to examine whether the Martian environment was hospitable for microbial life. (AP Photo/NASA/JPL-Caltech/MSSS)

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