Dr. Krauss: I mean, I have speculations. I have ideas and so do other theorists. I always hope I'm wrong. I've often said the two greatest states to be in if you're a scientist is either wrong or confused, and I'm often both.
Ms. Tippett: Yes, and in a positive way, you talk about that as beautiful and mystery is a word that's absolutely part of your vocabulary.
Dr. Krauss: Mysteries are what it's all about. In fact, not knowing is much more exciting than knowing, right? Because it means there's much more to learn. The search is often much more exciting than the finding. Mysteries are what drive us as human beings. I think it's really what drives scientists.