No doubt, the most challenging class of questions in science is the origin of things.

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.

Scientific literacy is an intellectual vaccine against the claims of charlatans who would exploit ignorance.

On some issues, I'm a staunch Conservative — like curtailing greenhouse gas emissions so that we can Conserve the environment.

As important as the civil rights movement was, I think what will rise to the top is that we left Earth in that time.

For your own safety, do not ever tell an astrophysicist, I hope all your stars are twinkling.

You don't need to be a scientist to know Earth's age or that life evolved. You just need be one who embraces objective truths