What Really Happens To A Body After Being In Space For A Year

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I read another article after I read the article about Astronaut Scott Kelly's near year in Space and what his body went through. This article was So Interesting. Here are the odd things that happen to a human's body after an extended time in the weightlessness of Space : 1) Loss of nearly 12 percent of bone density due to lack of exercise. 2) Muscles shrink due to not being needed and used. 3) Sleep deprivation , because in Space days aren't normal, may get 6 hours tops. 4) Because gravity isn't holding a person down, the Spine stretches adding 3 inches to a person's height. 5) Vision can worsen because of pressure changes in the brain. 6) A person's face gets more puffy due to body liquids spreading out more evenly. 7) A person's fluids shift from the legs to the head. The amount of fluid that does this could fill a two liter bottle.