Theoretical physicist, Dr. Michio Kaku, accepting the likelihood of extraterrestrial civilizations, has imagined four types, with Type 0 being the lowest. Our civilization is a Type 0, striving to become a Type 1. As I understand it, if we do not reach Type 1 status soon enough, our species may become extinct. A Type 0 civilization, depending as it does/ on fossil fuels, simply isn't sustainable. This is an essay by Michio Kaku which was published in the February 2006 issue of Cosmos Magazine: ..... - post revision - 2008-06-27 * Rho00030