I don't want people to say, 'Something is true because Tyson says it is true.' That's not critical thinking.

Now imagine a world in which everyone, but especially people with power and influence, holds an expanded view of our place in the cosmos. With that perspective, our problems would shrink-or never arise at all-and we could celebrate our earthly differences while shunning the behavior of our predecessors who slaughtered each other because of them.

We are part of this universe; we are in this universe, but perhaps more important than both of those facts, is that the universe is in us.

And extracting one molecule's signature in spectral analysis from the rest of the signatures is hard work, sort of like picking out the sound of your toddler's voice in a roomful of screaming children during playtime. It's hard, but you can do it.

I don't want to die ... I don't want to die poor. Two great motivators in the history of human cultures.

I have thoughts every day that are themselves tweets.

God is an ever receding pocket of scientific ignorance.