You don't discard Newton. Newton becomes the limiting case of how you would apply Einstein's theories.

If you're a scientist, and you have to have an answer, even in the absence of data, you're not going to be a good scientist.

There are books on my shelf that I'm not into. They are things I don't know anything about yet. It's going to lead me off into a new place. The books don't represent an interest; they represent a source of my ignorance.

All Plutophiles are based in America. If you go to other countries, they have much less of an attachment to either the existence or preservation of Pluto as a planet.

Not only do we live among the stars, the stars live within us.

There is no science in this world like physics. Nothing comes close to the precision with which physics enables you to understand the world around you. It's the laws of physics that allow us to say exactly what time the sun is going to rise. What time the eclipse is going to begin. What time the eclipse is going to end.

I would expunge the word "aptitude" from our vocabulary, because if you're interested in something, that's all that matters. You'll spend more time doing it, that than anything else, and possibly more time doing it than anybody else. And that's all that matters, because in the end, if you love what you do, you'll be your best at it compared to anything else you might have chosen as a career.