"Space is a really inhospitable place to live - there's no breathable air, microgravity wastes away your bones and muscles and you're subjected to increased doses of radiation in the form of high-energy charged particles."
"NASA reported that astronauts spending six months on the ISS experience between 80 millisieverts to 160 millisieverts of radiation, which is directly linked to health risks such as cancer and cardiovascular disease."
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