6 Ways Medicine in Space is Completely Different from on Earth

TIME

You may or may not want to go to space, but here’s something certain: you definitely don’t want to get sick there. Ask the crew of Apollo 7, the 1960s mission in which the commander contracted a cold, spread it to the other two astronauts and all three of them spent the entire mission trapped inside a cramped spacecraft, sneezing, hacking and griping at the ground.

And that was just 11 days in Earth orbit. What about a year aboard the International Space Station (ISS)? What about a two-and-a-half-year mission to Mars. And what about something a wee bit more serious than a cold—like appendicitis or a heart attack or a severe injury? Zero-gravity plays all manner of nasty games with the bones, muscles, organs, eyeballs, the brain itself—never mind the infectious risks that come from sealing half a dozen people inside a self-contained vessel, where a virus or bacterium…

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