One of these twins is going to space. Will he come back different?

One of these twins is going to space. Will he come back different?

It’s pretty well accepted in the sci-fi world that whenever you’ve got twins, one of them is bound to turn evil. Unless both are pretty evil. So NASA’s decision to send astronaut Scott Kelly to the ISS for a year, then compare him to earthbound twin Mark, can only be interpreted as one thing: a study to determine which twin turns to the dark side. Ain’t science grand?

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