Why in the world do they say that "laughter is the best medicine?" How in the world do you catch a case of the giggles? And what in the world is a Laughing Yogi?! Try not to LOL, as Guy Raz and Mindy Thomas guffaw their way through the science of laughter, on this seriously silly episode of Wow in the World! Originally aired August 7th 2017See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.