I bought it, I read it, and I heeded its advice. I remain unabducted.

The iron from that meteorite and the iron from your blood have common origin in the core of a star.

Any time we are answer-driven rather than idea driven, we have lost the true meaning of education.

The universe is hilarious! Like, Venus is 900 degrees. I could tell you it melts lead. But that's not as fun as saying, 'You can cook a pizza on the windowsill in nine seconds.' And next time my fans eat pizza, they're thinking of Venus!

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.

As the plow pushes through a parking lot of light fluffy snow, the snow clumps together in bigger and bigger chunks. Out in space, pressure hitting a gas cloud has a similar effect, except, instead of snowballs, you get stars!

For me, the most fascinating interface is Twitter. I have odd cosmic thoughts every day and I realized I could hold them to myself or share them with people who might be interested.