President Obama Really Wants People To Live On Mars
In an op-ed for CNN, the president wrote that he hopes to one day look at the night sky with his grandchildren and tell them that humans are living on Mars.
Đọc thêm tại NPR
at October 12, 2016 at 12:13AM
Health & Science
Thứ Tư, 12 tháng 10, 2016
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