(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

The flight lasted just under 40 seconds, but its significance was enormous. It proved that powered flight was possible in ...

The findings reveal that the Martian surface can preserve the kinds of molecules that could serve as signs of ancient life.

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This activity was supported by Contract No. NNH16CD01B/80HQTR20F0059 with the National Aeronautics and Space Administration. Any opinions, findings, conclusions, or recommendations expressed in this ...