What do you call those knobby things on doors that help you open them?

I'd like to live in a world where people embrace objective truths rather than be offended by them.

The dinosaurs never saw that asteroid coming. What's our excuse?

A common way to compute density is, of course, to take the ratio of an object's mass to its volume. But other types of densities exist, such as the resistance of somebody's brain to the imparting of common sense.

Knowing how to think empowers you far beyond those who know only what to think.

There are photons that have been traveling for 30,000 years, and I'm... snatching them from this journey and planting them into my digital detector. And then I started feeling bad for the photon, and I said maybe it wanted to continue but I got in its way. But then I said, no, those are probably happier photons than the one that slammed into the mountainside that will go unanalyzed and will not contribute to the depth of our understanding of the universe.

The first colony on Mars is not going to be built by a private company. How are you going to make money? You're not.