With An Eye To Mars, NASA is Testing its Astronaut Twins - Smithsonian
URL: http://www.smithsonianmag.com/science-nature/eye-mars-nasa-putting-its-astronaut-twins-work-180953358/
Submitted: Sat Nov 22 2014
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Luckily for NASA, when Scott launches into space this coming March, he will leave behind a copy of himself—his identical twin brother, Mark Kelly, a retired astronaut. Because the Kellys have virtually the same genetic material, NASA can study how ...