Must Watch: Bill Nye, Neil deGrasse Tyson, Pamela Gay, and Lawrence Krauss discuss our future in space

I'll come right out and say it: you need to watch this video. It's a bit on the long side, but the weekend is almost here, and you owe it to yourself to set aside 53 minutes to watch a veritable scientific dream team talk about humanity's future in space.
The video, originally shot back in July at TAM 2011 Las Vegas, is of a panel featuring Bill Nye, astronomers Neil DeGrasse Tyson & Pamela Gay, and theoretical physicist Lawrence Krauss—and the entire discussion is moderated by Bad Astronomy's Phil Plait. The subjects raised are consequential, the discussions thought provoking, and the opinions of the panelists refreshingly diverse (and often conflicting).