The bottom line is that time travel is allowed by the laws of physics.

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.

Science is the process that takes us from confusion to understanding.

When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level

Exploring the unknown requires tolerating uncertainty.

We're on this planet for the briefest of moments in cosmic terms, and I want to spend that time thinking about what I consider the deepest questions.

Intelligence is the ability to take in information from the world and to find patterns in that information that allow you to organize your perceptions and understand the external world.

I was holding [my four-year-old daughter] and I said, 'Sophia, I love you more than anything in the universe.' And she turned to me and said, 'Daddy, universe or multiverse?'

Free will is the sensation of making a choice. The sensation is real, but the choice seems illusory. Laws of physics determine the future.

All you are is a bag of particles acting out the laws of physics. That to me is pretty clear.

Physics grapples with the largest questions the universe presents. Where did the totality of reality come from? Did time have a beginning?

Sometimes you have to do something ugly so that something beautiful can grow.

She was—of course—perfectly normal—quiet and polite andreasonablyintelligent and...normal andself destructive and lonelyand terrified of everythingAnd she lovedDisaster—

it's all a popularity contest, which unfortunately often has more to do with good looks rather than actual talent.

What surprised me was that within a family, the voices of sisters as they're talking are virtually always the same.

Attacks on alternative religious groups are attempts to psychologize - to medicalize - a controversy that, on deeper examination, is clearly a controversy over ideology and lifestyle.

I'm not married. I hope to be someday so I can stop exercising.

If it wasn't for race mixing, there'd be no video girls.

Believe it or not, I want to keep growing my audience.

Well, beauty's in the eye of the beholder... It's all subjective. I'm kind of shy about it, but I'll take it.

To be a poet you have to experiment.