Inhabited area can only be 4 types, by Dr. Pace in University of George Washington.

Which are Antarctica, Mt. Everest, North Sea oil platform and space colonies. The place we've been living is a kind of space colonies. And now some people really have to think over that do we really need another space colonies on different planets? Or do we just need oil platform ? As of now I'd agree with oil platform, but who can tell what's going to be the happiest for human being, and for the Earth?

in reference to: Augustine Report Expert Quotes - XCor, John Carmack, Buzz Aldrin and Norman Augustine on the Future of NASA - Popular Mechanics (view on Google Sidewiki)