We hear about this mysterious force all the time in fiction and film -- but what is it actually supposed to be? Is there any evidence that it might be real? Learn more about your ad-choices at https://www.iheartpodcastnetwork.com They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/ See omnystudio.com/listener for privacy information.