In 2001, when most of us had no idea what it meant to "go viral," Jonah Peretti shared an email prank among his friends — and saw it spread to millions. That began his fascination with how information spreads, and set him on the path to launch two of the most powerful media organizations of the Internet age: The Huffington Post and BuzzFeed. Recorded live in New York City. Learn more about your ad choices. Visit podcastchoices.com/adchoices