At long last Earthlings may be on the verge of colonizing another planet—but those first Terran ambassadors will be plants, not humans.
NASA is expected to announce within days whether they will attach a one-liter “greenhouse” to its next Mars rover to be launched in 2020. A similar greenhouse would take a voyage to the moon with any team that manages to land a robot there by 2015 to snag Google’s Lunar X PRIZE. These experiments could illuminate whether human colonization of the moon or Mars could be possible.
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