From TED: How can our strange, gray, gooey brains create inspired inventions, the feeling of hunger, the experience of beauty, the sense of self? And how reliable are they? Dan Dennett contemplates the mind as an ecosystem in which a new class of entities — memes — can compete, coexist, reproduce and flourish, and asks what sorts of nefarious things these entities might be up to. An enthusiastic Dan Gilbert presents his new research on the peculiar, counterintuitive — and perhaps a smidge deflating — secret to happiness. And Jeff Hawkins explains why a napkin-sized sheaf of cellular matter, wrinkled into a ball, will fundamentally change the direction of the computer industry.