In his new book, "Law and Order," David Frum argues that people are lazy when they try to categorize things. He says it's not just how many colors there are but also the different shades of them. For example, he asks why we have more precision in labeling hair color than our ability to identify a perpetrator.
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.”