Obama Declares Humans Should Go To Mars By The 2030s
President Obama has once again declared that humans should go to Mars by the 2030s. NPR looks back on his eight years in office to see whether he's put NASA on track to get there.
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at October 13, 2016 at 03:32AM
Health & Science
Thứ Năm, 13 tháng 10, 2016
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