Most people agree that our departure from earth was caused by a combination of factors. There was a devastating war between monsters and supermen; ravenous political factions vying for power; and religious zealots saying one thing, and doing quite another. But in a nutshell, we were forced to evacuate the planet because of an uncomfortable feeling in the legs. We lost earth because of Restless Leg Syndrome. Just like that, in the blink of an eye,...