Space
‘Rhythms’ in Martian rocks mark out past climate swings
Giant stairsteps on Mars are evidence of ancient climate cycles, suggest images from NASA's Mars Reconnaissance Orbiter
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Giant stairsteps on Mars are evidence of ancient climate cycles, suggest images from NASA's Mars Reconnaissance Orbiter
Despite problems with NASA's Phoenix lander, the Sun's rays could match nuclear power for powering a human base on Mars, say energy specialists