David Ewing Duncan is the author of seven books including the worldwide bestseller Calendar. His latest book is Experimental Man: What one man's body reveals about his future, your health, and our toxic world. He is Chief Correspondent of public radio's Biotech Nation, a commentator on NPR's Morning Edition, and a contributing editor and a columnist for Conde Nast Portfolio. He has been a contributing editor to Wired, Discover and Technology Review, and has written for Harper’s, The Atlantic, Fortune, and many other publications. He is a former special correspondent and producer for ABC Nightline and a correspondent for NOVA’s ScienceNOW! He has won numerous awards including the Magazine Story of the Year from the American Association for the Advancement of Science. He is the Director of the Center of Life Science Policy at UC Berkeley.