If you look at Einstein's equations and put in low speeds and low gravity, they become Newton's equations.

Imagination alone is not enough, because the reality of nature is far more wondrous than anything we can imagine

People generally don't recognize how long it takes to conceive, publish, and write a book.

The caricature of science is that we hold tight to the theories we have, and shun challenges to them. That's just not true. In fact, we hold our highest rewards for those scientists who can prove others wrong. And by the way, they are famous in their own lifetimes. We don't wait until they're dead.

I don't like trying to influence politicians, who are themselves representative of huge numbers of people. As an educator, I'd rather enlighten the people and educate the people and let they be the ones who put the pressure on their elected officials.

Practically every food you buy in a store for consumption by humans is genetically modified food. There are no wild, seedless watermelons. There’s no wild cows.

Thomas Jefferson basically secularized Jesus.