Mounting a mission to Mars is unimaginably complex. Sending astronauts to the Moon took four days; Mars is a one-way journey of at least five months. How could we possibly build a ship large enough and safe enough to accommodate their needs, for a round-trip journey of at least 18 months? NASA has the answer--an audacious plan to put 30 people on the Red Planet--unless those who oppose the plan can destroy the ship first.
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