In this passionate talk, legendary spacecraft designer Burt Rutan lambasts the US government-funded space program for stagnating and asks entrepreneurs to pick up where NASA has left off.

This whimsical wrap-up of TED2006 -- presented by Einstein, the African grey parrot, and her trainer, Stephanie White -- simply tickles. Watch for the moment when Einstein has a moment with Al Gore.

Peter Diamandis says it's our moral imperative to keep exploring space -- and he talks about how, with the X Prize and other incentives, we're going to do just that.