If you just take a single human and put him or her in the forest he or she might not do very well without some sort of education which he got or she got from some tribe.

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.

Real beauty is not in your face

Leave it to a vampire to think a healthy guy in his late thirties or early forties was on his deathbed.

I've lived the American Dream, but, sadly, for too many, the American Dream is fading.

Wherein is the use of getting rid of one thorn out of many?

I'm kind of a germ freak. When I get on a plane, I spray my seat and everything with Lysol Disinfectant Spray.

I am a Negro: Black as the night is black, Black like the depths of my Africa.

The discovery of an important need is almost as important as the invention which satisfies this need.

I had no idea that history was being made. I was just tired of giving up.

The laws of God, like the law of gravity, do not depend upon how I feel about them. They are inexorable.

As many times as [HIV] changes its clothes, it's still wearing the same socks, and now our job is to make sure we get the body to really hate those socks.