Retired Director of NASA’s International Space Station on Plausibility of Elysium

The idea of putting all of Earth's richest people in space permanently has its appeal. Some very much would like to go, and a few of us would like to send them there. Is such a thing possible, though? To build a huge, permanent, self-sustaining home-off-of-home? Director Neill Blomkamp, the man behind the fantastic aliens-as-refugees ...