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Must Watch: Bill Nye, Neil deGrasse Tyson, Pamela Gay, and Lawrence…

I'll come right out and say it: you need to watch this video. It's quite a bit longer than a lot of what we feature here on io9, 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. » 10/21/11 12:08pm 10/21/11 12:08pm