Mars' halcyon times may have been fleeting
Paris (AFP) April 13, 2014 - Cold and dry today, Mars was previously warm and wet but possibly only at intervals, a study published on Sunday suggests. Scientists have long puzzled over what happened to the water, the precious stuff of life, on the Red Planet. Unmanned spacecraft have sent home tantalising images of gouged canyons, valleys and sedimentary deltas, while landers have found hydrous rocks, all suggestin ... more

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