Climate change is a real deal. So, hey deniers - cut it out, and let's get to work.

Everyone you will ever meet knows something you don't.

We are just a speck, on a speck, orbiting a speck, in the corner of a speck, in the middle of nowhere.

To leave the world better than you found it, sometimes you have to pick up other people's trash.

Science is the best idea humans have ever had. The more people who embrace that idea, the better.

You and I are made of stardust. We are the stuff of exploded stars. We are therefore, at least 1 way that the Universe knows itself. That, to me, is astonishing.

There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.

I speak with dogs frequently. They don't really talk, but I feel they're communicating.

The natural world is a package deal; you don't get to select which facts you like and which you don't.

The more you find out about the world, the more opportunities there are to laugh at it.

Science is the best thing humans beings have ever come up with. And if it isn't, science will fix it.

It is good to be taught humility when we are young. If we do not exeperience pain as children, we will cause pain as adults.

A man who builds his own pedestal had better use strong cement.

General..behold the future of weaponry.""What the hell I am seeing here, Colonel?""It's..technologart of ancient weaponry, Sir!""It's..what?

When we run away from something. We're usually running away from ourselves.

It's good to have a reminder that we can love ourselves and be beautiful even though we don't really fit into certain standards of what beauty may be.

I have a wife, a son, and I've had some practical life experience.

It is a tragedy that most of us die before we have begun to live.

Love can make the difference-love generously given in childhood and reaching through the awkward years of youth . . . and encouragement that is quick to compliment and slow to criticize.

I used to walk into a party and scan the room for attractive women. Now I look for women to hold my baby so I can eat potato salad sitting down.

It's hard to be famous and alive.