David Raup's book 'Extinction' thought it was mostly bad luck. this research suggests some extinctions are in the genes: - http://sciencenow.sciencemag.org/cgi/content/full/2009/807/1 - The following article should be enjoyed by John and George: intelligence and free-floating imagination in the lab put us on the way to solving the problem of the code of life: - http://www.physorg.com/news168875229.html