Da Vinci's Notebooks

Walter Isaacson, author of Leonardo Da Vinci, discusses the Renaissance genius' wildly eclectic notebooks that contained everything from landscape sketches to math equations to 'to do' lists. Learn more about Walter Issacson, University Professor of History at Tulane and former editor at Time magazine, at http://www.simonandschuster.com/authors/Walter-Isaacson/697650