Dorion Sagan son of Lynn Margulis and Carl Sagan, is co-author of the illustrated science books What is Life? and What is Sex? as well as Slanted Truths: Essays on Gaia, Evolution and Symbiosis. He is currently writing “Into the Cool: The New Thermodynamics of Creative Destruction” (Henry Holt) and “Evolution in Spirit.” He can be reached at gradientor@aol.com.