An American astronaut experienced multiple biological changes in space but retur...
COLORADO SPRINGS, Colo. - An American astronaut experienced multiple biological changes in space but returned to normal - with some exceptions - after coming back to Earth, according to a study involving twin brothers that shed light on how space flight affects the human body.
Scott Kelly during the flight experienced thickening of the carotid artery and retina, weight loss, shifts in gut microbes, reductions in cognitive abilities, DNA damage, changes in gene expression, and a lengthening of the ends of chromosomes called telomeres, scientists said. The study will help scientists better understand the changes astronauts undergo during long-term space travel, crucial knowledge as NASA contemplates human expeditions to the Moon and Mars.
“Radiation is much lower than what we expect it to be going to Mars,” said Steven Platts, deputy chief scientist at NASA’s Human Research Program.
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