Why can't Pluto be a planet? Some people like Pluto. And if it doesn't exist then they don't have a favorite planet. Right? Please write back but not in cursive because I can't read cursive.

The people talking on their cell phone and following GPS instructions to where grandma's house is saying I don't need space - excuse me, that's how you know where grandma lives, and when to make the left turn.

When I grew up I assembled my role models à la cart. I wanted to be an astrophysicist. If I tried to find a role model who grew up in the Bronx with my skin color who was an astrophysicist, I would never have become an astrophysicist.

I'm revealing information to people. I'm not creating it. And to the extent that people embrace it, I think they're empowered by it, because any time you have a bigger perspective today than you did yesterday, it's got to be only for the good of your mind, your body, your soul.

One thing in life is for certain, the more profoundly baffled you have been in your life, the more open your mind becomes to new ideas.

If cosmological theory were dominated by women, who are no strangers to cycles, how can we know for sure that we wouldn't then be told that the oscillating universe is the more aesthetically fulfilling alternative?

When you are a hammer, all of your problems will look like nails to you.