Most of us probably don’t scream every day, but we are no strangers to hearing yelling. Small children frequently shout at shopping centers, and we hear loud shouting at rock concerts and sporting events. Over the years, there have even been contests such as the world screaming competition held in Thailand in 2009. What has not been attempted before is yelling on a worldwide scale. We will examine some of the possible effects of this unusual sound experiment in this episode of The Infographics S