The cities of the future are massive, sprawling, beautiful monsters, covering entire coastlines — and in some cases, entire continents. Whether it's Judge Dredd's Mega-Cities or William Gibson's "Sprawl," future cities always devour land. Here's a map of future megalopolises.
Is our planet actually inhabitable to humans? Most of us would answer yes, but the answer's a lot more complicated, writes Charles Stross. And those complications have dire implications for our hopes of colonizing other worlds.