Apocalyptic thinking is everywhere, from predictions about Christian “end times” to the 2012 Mayan prophecy about the end of the world. So what’s going on? In this hour of To the Best of Our Knowledge we’ll talk with renowned religious historian Elaine Pagels about the lasting impact of the Book of Revelation, and we’ll dig into the real history of the Mayan calendar. Also, a sobering look at the threat of nuclear war. And philosophy's wild man, Slavoj Zizek, weighs in on the coming apocalypse.