Deep Time, Big History, and Existential Risk Link: http://www.centauri-dreams.org/... "In the early history of our species, ignorance of existential risk was bliss. Human beings, their hominid predecessors, and the species that preceded them in turn, were fortunate merely to survive, i.e., to overcome the immediate existential risks posed by... - https://picasaweb.google.com/1068082...