Intelligent life can't be all that common because it's really rare on Earth and especially since we define ourselves to be intelligent. But in the eyes of an alien coming here who has the technology to make it here, they might observe us and conclude that there's no sign of intelligent life on Earth.
Neil deGrasse TysonYou know, there's black holes and what - could there be wormholes? Could - might there be a multi-verse? These are all fascinating frontiers. What is the nature of dark matter and dark energy? And what was around before the universe? And do we have access to higher dimensions?
Neil deGrasse TysonI don't want to make a member of Congress do something that that member of Congress's constituents would not approve of, or would not agree to. So in that regard, I'm kind of the opposite of a lobbyist.
Neil deGrasse TysonThe center line of science literacy - which not many people tell you, but I feel this strongly, and I will go to my grave making this point - is how you think.
Neil deGrasse TysonWe in astrophysics we think of the universe all the time. So to us, Earth is just another planet. From a distance, it's a speck. And I'm convinced that if everyone had a cosmic perspective you wouldn't have legions of armies waging war on other people because someone would say, "Stop, look at the universe."
Neil deGrasse Tyson