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View Diary: Woo-hoo! Awesome SpaceX Grasshopper "Hover-Slam" Rocket Launch Doubles Previous Height (w/Video) (40 comments)

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  •  You can rest easy on one point. (8+ / 0-)

    A temperature increase of 3-4 C wouldn't be enough to kill off "high order life" - it would just lead to economic and political disruption that could produce a Dark Age.  During the Jurassic period in Earth's history, the global climate was basically tropical worldwide - crocodiles swam above what is now the Arctic Circle, and atmospheric CO2 concentrations were 1,950 ppm.  That was about 3 C above where we are now.

    But just in general, what's the point of pessimism?  Scientific, technological, and social progress all require optimism - they require people to be energized about the future they can create, and believe in their own power to make things change for the better.  Fatalism is fatal to progress.  

    Ask me if I'm afraid. I say, "Of course not. I'm a fool, and fools never die."

    by Troubadour on Sat Mar 09, 2013 at 04:33:20 PM PST

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