A state of negative energy means that you are essentially getting something for nothing.

The most accessible field in science, from the point of view of language, is astrophysics. What do you call spots on the sun? Sunspots. Regions of space you fall into and you don’t come out of? Black holes. Big red stars? Red giants. So I take my fellow scientists to task. He’ll use his word, and if I understand it, I’ll say, “Oh, does that mean da-da-da-de-da?

I don't know why a beauty salon would have a cop's hat and the curling irons are not deadly unless they're still plugged in and they're hot. So I'm not quite sure about that. But I don't know who remembers anymore that you can ignite spray cans, plus there aren't really any spray cans anymore 'cause that was destroying the ozone layer. So I'm - actually, I'll have to go with they chased him with the curling irons.

There's no shortage of people that we can put on, because science touches us all.

I believe that the manned space program can engage the public by advancing the space frontier. Every next mission takes you farther out in space than you were before, either technologically or in terms of distance.

Society needs to see science not as a luxury of funding but as a fundamental activity that drives enlightenment, economics, and security.

Our entire universe emerged from a point smaller than a single atom. Space itself exploded in a cosmic fire, launching the expansion of the universe and giving birth to all the energy and all the matter we know today. I know that sounds crazy, but there’s strong observational evidence to support the Big Bang theory. And it includes the amount of helium in the cosmos and the glow of radio waves left over from the explosion.