Neil deGrasse Tyson - Columbus Discovering America Was a Great Achivement - Joe Rogan

Neil deGrasse Tyson is an astrophysicist, director of the Hayden Planetarium at the American Museum of Natural History, and host of "StarTalk Radio." His newest book, "Starry Messenger: Cosmic Perspectives on Civilization," is available now. www.haydenplanetarium.org/tyson/