One of the great challenges in this world is knowing enough about a subject to think you're wright, but not enough about the subject to know you're wrong.

One of the great challenges in this world is knowing enough to think you're right, but not enough about the subject to know you're wrong.

I think if everyone had the luxury to pursue a life of exactly what they love, we would all be ranked as visionaries and brilliant.

I think science has a better story to tell than anyone else has been able to tell and that's because it's based on the rigorous winnowing that science and scientists are always doing in order to find out what's really happening. I think it's really good to encourage generally our ability to tell stories and that's a great skill that we come by naturally, so I'm excited about that.

In America, there are people who don't read science fiction but still think about tomorrow, so it's not only the force of science-fiction that makes you a tomorrow thinker.

As a scientist, I want to go to Mars and back to asteroids and the Moon because I'm a scientist. But I can tell you, I'm not so naive a scientist to think that the nation might not have geopolitical reasons for going into space.

I don't want to go into space because of war. I think we would if it was triggered. If China said they want to put military bases on Mars, we'd be at Mars in two years. That would be quick. I don't want that to be the reason.

I think on some level, role models are overrated If you require a role model who looks just like you to be something you wanna be and you can't find one, is that a reason to not be what you wanna be? No!

Space is the ultimate frontier. I think when people historically thought of the frontier, there was where you were living and then there was some edge beyond which no one had explored.