All information is good, even when it is bad.

Just to settle it once and for all: Which came first, the chicken or the egg? The egg, laid by a bird that was not a chicken.

I'm often asked whether I believe in Global Warming. I now just reply with the question: "Do you believe in Gravity?"

I suppose I can live with missing decimals, missing floors to tall buildings, and floors that are named instead of numbered. A more serious problem is the limited capacity of the human mind to grasp the relative magnitudes of large numbers. Counting at the rate of one number per second...to count to a trillion takes 32,000 years, which is as much time as has elapsed since people first drew on cave walls.

When I needed to overcome the low expectations of others or the bias that would be expressed in one circumstance or another, I'd keep on keeping on. And I climb over the obstacle, go around it, dig under it, fly over it. That's what kept me going. Otherwise I would have never been an astrophysicist.

It’s short-sighted to think ads won’t one day end up wherever humans are - even the moon.

Many people feel small because they're small and the universe is big, but I feel big.