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30 January 2009

  • curprev 08:4908:49, 30 January 2009Michael talk contribsm 4,476 bytes −2 small edits, clarify "some" conditions of sustainable civilizations, not "the" conditions, as the perspective should elucidate some necessary conditions but not claim to have a complete picture

11 January 2009

5 January 2009

31 December 2008

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12 December 2008

  • curprev 12:2812:28, 12 December 200892.65.198.50 talk 2,608 bytes +105 Removed "As far as we know that would allow for many millions of human generations.", added "civilization in a billion years", clarifed perspective

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