If you're an adult and you choose not to believe in science, fine, but please don't prevent your children from learning about it and letting them draw their own conclusions.

I like to regard myself as someone who's capable of critical thought, that is to say, who can evaluate claims.

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.

Everyone, red state, blue state, everyone supports space exploration.

You can compromise between good, better, and best, and you can compromise between bad and worse and terrible. But you can't compromise between good and evil. And now people look at the other side as a completely different kind of animal and say, 'They are taking the country down the road to purgatory.' It's complete intolerance.

When I travel, I love speaking to women around the world about the things that inspire them, the fashions they like, what makes something good and what would make it even better.

I respect Demetrious Johnson to the fullest. I wouldn't travel the world and find different training partners and coaches to help me defeat this man if I didn't want to win.

It is not a Pandora's box that science opens; it is, rather, a treasure chest. We, humanity, can choose whether or not to take out the discoveries and use them, and for what purpose.