21 Dec 2014, 16:49 UTC
You don't have the right version of the adobe flash player to see this video. Please upgrade or install it at "http://get.adobe.com/flashplayer/"Subscribe to iTunes
Put on your thinking caps as Neil Tyson and Leighann Lord answer fan questions about pseudoscience, from crystals to creationism and ancient aliens to alternative medicine. Plus, a new interview with Elise Andrew, Bill Nye, and Chuck Nice.