It’s short-sighted to think ads won’t one day end up wherever humans are - even the moon.

If you don't question you're stuck within a pre-existing parameters of knowledge. Questions are what take you outside of those parameters.

My only hope is that every other alien civilization isn't doing exactly what we are doing because then everybody would be listening, nobody would be receiving, and we would collectively conclude that there is no other intelligent life in the universe.

The urge to miniaturize electronics did not exist before the space program. I mean our grandparents had radios that was furniture in the living room. Nobody at the time was saying, 'Gee, I want to carry that in my pocket.' Which is a non-thought.

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

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.

No one is saying you're possessed by the devil anymore except the most ignorant of people in modern culture.