Space Colonization Wiki

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13 January 2014

12 December 2011

25 November 2011

  • curprev 12:4512:45, 25 November 2011109.58.199.37 contribs 295 bytes +295 Created page with "One type of rubber, polybutadiene, which ordinary squash balls are made of, can be used as rocket fuel. It is much cheaper, safer and more environmentally friendly than conventio..."