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Fact: One day the earth will no longer be a suitable habitat for H. sapiens.
Not that I think we're more worthy than any of the other species on the planet, but any work we can put in that will help increase the likelihood that humanity outlives the rock it was born on is well worth the effort in my book. Part of the solution to the problem of a dying earth will almost certainly involve space travel, be it some form planet hopping or a (semi) permanent space-cation
As far as who does it? The more the merrier. I only wish we could pool our resources more effectively and possibly accomplish more, faster. I think it would be useful to stop thinking about America/NASA putting a man on Mars and start thinking about Earth putting a person on Mars. From there, who knows what's next. Hopefully a moon colony but we have a long way to go before that.
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The advantage law is the best law in rugby, because it lets you ignore all the others for the good of the game.
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