The worse case scenario has played out. It's a few years from now, and Earth has suffered a major catastrophe - be it an asteroid impact, a nuclear holocaust or merely a global pandemic. Doomsday has arrived. In Part II of our two-part series, you'll find out how the planet - and its mantle of remaining life - carries on. So humans are gone: what next?Also, why mass extinctions are helpful to evolution, and if a few people do survive Armageddon, how do they begin to put human culture back together?Guests: Alan Weisman - author of The World Without Us Peter Ward - Paleontologist at the University of Washington, Seattle and author of Under a Green Sky: Global Warming, the Mass Extinctions of the Past, and What They Can Tell Us About Our Future Carol Tavris - Social psychologist and author of Mistakes Were Made (But Not By Me) Hugh Gusterson - Anthropologist, George Mason University Listen to Doomsday Part I: The Early Hours (January 24, 2007). Less