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3 April, 00:10

A 30-year-old astronaut goes off on a long-term mission in a spacecraft that travels at speeds close to that of light. the mission lasts exactly 20 years as measured on earth. biologically speaking, at the end of the mission, the astronaut's age would be

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  1. 3 April, 00:40
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    Less than 50 years i do believe.
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