Why do everyday words like "Okay" and "Cool" have hidden histories? Cody Tucker, host of "And Now You Know," joins Joe Rogan to discuss his rabbit-hole research habits, a CIA fraud case, Theranos, the CIA's role in modern art, and his new book on the etymology of common phrases. Cody Tucker says he reads constantly and skims quickly, clipping surprising facts that became his popular social media content and podcast segments.