Mars Global Surveyor

"Mars beckons," Carl Sagan used to say. The only known planet besides Earth with accessible oxygen and water, the only planet that has ever hinted (but not yet proved) it harbored extraterrestrial life, Mars beckons uniquely as a place for human exploration in the future. Excerpted from Building Toward Mars: A Vision for the Future

Mars pathfinder/Sojourner Rover Mars Global Surveyor


Why study Mars?

The two links above take you to various NASA sites which describe in detail the purpose and results of these two important Mars experiments.

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