Evolution is the fundamental idea in all of life science - in all of biology.

It's important that our children are raised to be educated, well-rounded tax-paying citizens that understand the importance of technology and science.

NASA is an engine of innovation and inspiration as well as the world's premier space exploration agency, and we are well served by politicians working to keep it that way, instead of turning it into a mere jobs program, or worse, cutting its budget.

To try to really land a spacecraft really on another world is really difficult, and if we lose that ability, it's going to be heartbreaking.

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

Humor is everywhere in that there's irony in just about anything a human does.

I really believe in science. It is a faith. It is a reverence akin to religion. But as we always say, it's different from religion in that, as near as we can tell, it exists outside of us. It has an objective quality, the process of science.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

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

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

If the Earth gets hit by an asteroid, it's game over. It's control-alt-delete for civilization.