http://www.gizmag.com Cooperation, despite being now considered the third force of evolution, just behind mutation and natural selection, is difficult to explain in the context of an evolutionary process based on competition between individuals and selfish behavior. But this puzzle, that has haunted scientists for decades, is now a little closer to be solved by research about to be published on the journal Physical Review Letters. en gizmag.com http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-907 http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-907 Tue, 10 Feb 2009 15:02:14 -0600 http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-895 http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-895 Tue, 10 Feb 2009 00:53:18 -0600 http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-889 http://www.gizmag.com/evolution-cooperation-less-selfish-societies/10935/#comment-889 Mon, 09 Feb 2009 20:20:59 -0600