The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP
The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP

Why is Mars cold and dry? Blame the sun

The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP
The planet Mars as seen by the webcam on the Mars Express orbiter. Solar winds are believed by scientists to have stripped what was once a warm, wet atmosphere. Photo: European Space Agence via AFP
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