Wikipedia, Subatomic particle, http://en.wikipedia.org/wiki/Subatomic_particle (as of July 21, 2010, 02:17 GMT).

Wikipedia, Drake equation, http://en.wikipedia.org/wiki/Drake_equation (as of July 21, 2010, 03:23 GMT).

Wikipedia, Hugh Everett III, http://en.wikipedia.org/wiki/Hugh_Everett_III (as of Aug. 6, 2010, 00:39 GMT).

Wikipedia, Tim Berners-Lee, http://en.wikipedia.org/wiki/Tim_Berners-Lee (as of Aug. 6, 2010, 00:41 GMT).