mark kelly
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NASA compared twin astronauts to see if space ages the human body
A NASA study that compared two twins, one who finished a nearly year-long mission in space and one who spent that time in Earth, found that most of the dramatic changes that happen to the human body in space aren't permanent. Scott Kelly, who was aboard the International Space Station between 2015 and 2016, experienced many physical and genetic changes that his twin brother and fellow astronaut Mark Kelly, who was back on Earth, did not. But once the Kelly brother who was in space landed, his body gradually returned to normal. Some negative impacts from the mission still linger on Kelly, posing a challenge for scientists as they explore longer space flight, such as travel to Mars.
Space Shuttle Endeavour lifts off one last time (video)
NASA's Endeavour shuttle marked its final launch today, lifting off from Cape Canaveral, Florida, a fortnight after an initial takeoff was scrubbed over concerns surrounding an auxiliary power unit heater. A six-member crew lead by commander Mark Kelly and some tiny satellites are on-board for the STS-134 mission, which involves the delivery of the massive cosmic ray-collecting Alpha Magnetic Spectrometer and some spare parts to the International Space Station. NASA's 134th flight is the penultimate mission for the current fleet of shuttle -- Atlantis will liftoff for a final time in July. Video of the smoke-filled majesty after the break.
