Other job markets may lay claim to the title, but astronomy is actually the world's oldest profession.

However, science isn't just about showing when you're right; it's also about showing when you're wrong.

If a little kid ever asks you just why the sky is blue, you look him or her right in the eye and say, 'It's because of quantum effects involving Rayleigh scattering combined with a lack of violet photon receptors in our retinae.'

Pseudoscience is like a virus. At low levels, it's no big deal, but when it reaches a certain threshold it becomes sickening.

Not everything that’s cool is science, but everything in science is cool.

When you're dealing with the universe, ignorance can be deadly.

If you took every nuclear weapon ever built at the height of the Cold War, lumped them together and blew them up at the same time, that would be one one-millionth of the energy released at that moment.