There's a funny thing about space exploration: If something goes wrong aboard ship the consequences could easily be terminal. Outer space is one of the most inhospitable environments imaginable, and meat bodies are remarkably resilient as long as you don't remove them from their native environment (which is to say dry land, about one atmosphere of pressure, and a remarkably fiddly chemical composition). Space travel inherently removes meat bodies from their usual environment and puts them into a complex, fragile replica made of alloys, plastics, and engineering; as we all know, the more complex something is, the more things can …