A new study on Mars's climate, the only planet we know changed from habitable to uninhabitable, suggests loss of CO2 is not the only reason behind Mars' dry climate.
"The Vanished Rivers" -Mystery of How Mars Became Uninhabitable Endures dailygalaxy.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailygalaxy.com Daily Mail and Mail on Sunday newspapers.
Mars once ran red with rivers. The telltale tracks of past rivers, streams and lakes are visible today all over the planet. But about three billion years ago, they all dried up and no one knows why.