When we try to look farther into the universe we come to what appears to be the end of space but actually it's the beginning of time.

I would teach how science works as much as I would teach what science knows. I would assert (given that essentially, everyone will learn to read) that science literacy is the most important kind of literacy they can take into the 21st century. I would undervalue grades based on knowing things and find ways to reward curiosity. In the end, it's the people who are curious who change the world.

95, 96 percent of all that drives the universe has no known origin.

If God to you is where science has yet to tread, then God is an ever-receding pocket.

There's a lot of memorization that goes on in school. You memorize vocabulary words and all these sorts of things.

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.

With one linear centimeter of your lower colon there lives and works more bacteria (about 100 billion) that all humans who have ever been born. Yet many people continue to assert that it is we who are in charge of the world