Astronaut Scott Kelly Now Has Different DNA Than His Identical Twin Brother After One Year In SpaceWhile Scott Kelly's height and 93 percent of his DNA returned to normal after returning to Earth, NASA confirmed that seven percent of his genes have remained changed and may stay that way.
Yearlong Spacemen Embrace Fresh, Frigid Air Back on EarthAh, there's nothing like a blast of fresh, frigid air to welcome you back to the planet after nearly a year cooped up in space.
NASA Spaceman Back from Record Year Flight; Gives Thumbs UpAstronaut Scott Kelly returned to Earth on Wednesday after an unprecedented year in space for NASA, landing in barren Kazakhstan with a Russian cosmonaut who shared his whole space station journey.
Mark Kelly, Twin Brother To Help NASA Study Effects Of Spaceflight On The Human BodyAstronaut Mark Kelly and his twin brother will help NASA study the effects of spaceflight on the human body.
Astronaut, Cosmonaut To Spend Year In Space TogetherThe two men who will spend an entire year together aboard the International Space Station are already bracing for a challenging mission.
Brother Of Giffords' Husband To Attempt Longest Spaceflight Ever By AmericanA former space shuttle commander whose twin brother is married to former Rep. Gabrielle Giffords will attempt the longest spaceflight ever by an American.

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