 So what stuff keeps you awake at night, proverbially, now? Is it dark matter, dark, dark energy, that kind of stuff? What do you think? No, I'm a little more obscure than that. Okay. What keeps me awake is wondering what questions I don't yet know to ask, because they would only become available to me, visible to me, after we discover what dark matter and dark energy is. Because think about it, the fact that we even know how to ask that question, that's almost half the way there. Sure, because you know there's something there. There's something there, and I can design an experiment, as we're doing now, with face probes and things. But I want to know the question that I can't know yet, because it's not available to me, it's not in reach. That's what keeps me awake at night. What is the profound level of ignorance that will manifest after we answer the profound questions we've been smart enough to pose thus far? Hey everyone, thanks for watching. If you want to see the full episode with Neil deGrasse Tyson, I invite you to click the link in the description. For more awesome interviews with incredibly fascinating people, or inside knowledge from the best in influence, persuasion, negotiation, and nonverbal communication, please hit that subscribe button.