Trying to Solve the Great Mars Mystery [NASA Space Science HD]

The planet Mars is a cold and dry wasteland. Yet it once was much warmer and had liquid water flowing on its surface. What happened? The NASA Maven spacecraft will soon journey to the red planet to try to find out.

The planet Mars is a cold and dry wasteland. Yet it once was much warmer and had liquid water flowing on its surface. What happened? The NASA Maven spacecraft will soon journey to the red planet to try to find out.

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