We have the only cookbook in the world that has partial differential equations in it.

When we first did 'Modernist Cuisine,' I think most people in cookbook publishing would have said, 'This is insane.'

One of the greatest things that Apple and Jobs were very good at doing was daring to do the very different thing. It's what I did with my cookbook, frankly.

I thought of computers as very low class. I thought of myself as a pure mathematician and was interested in partial differential equations and topology and things like that.

Suppose that every prospective parent in the world stopped having children naturally, and instead produced clones of themselves. What would the world be like in another 20 or 30 years? The answer is: much like today. Cloning would only copy the genetic aspects of people who are already here.

In politics, religion and other areas of culture, people disagree on the worth of competing ideas. There is no equivalent to the scientific method that can determine in a robust way which ideas match the real world, and which ones can be ruled out. So conflicting ideologies persist indefinitely.