Bob Greene: Ask that question in 1973. And I'm wondering if you can share with our listeners when you were first asked that question. Well, I knew it before others had asked me. I just thought it was an intriguing fact. Who doesn't love intriguing facts? It's usually because someone sifted through random information and found something that was particularly interesting.
Neil deGrasse Tyson—world-renowned astrophysicist, Emmy-nominated host, and author—is one of the most popular and influential figures in modern science. He joins to discuss his cosmic career and new book, “Starry Messenger: Cosmic Perspectives on Civilization.”