Click the image to watch a short clip in which I give an overview about the brain on the History Channel.
In September, 2009, Sum became the number 2 book in the United Kingdom on Amazon's bestseller list, only behind Dan Brown's Lost Symbol.
Listen to an interview on BBC's Today Programme regarding the new iPad book Why the Net Matters.
Click here to watch David's talk on possibilianism at PopTech. Executive director Andrew Zolli wrote: "This is one of the best talks ever at PopTech. Everyone should watch this."