As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York. The trouble is, it is not repeatable. The next time the butterfly flaps its wings, a host of other things will be different, which will also influence the weather. That is why weather forecasts are so unreliable.

So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws of motion.

Only time - whatever that may be - will tell.

The boundary condition of the universe is that it has no boundary.

The thing about smart people is that they seem like crazy people to dumb people.

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.