Health, life and love: The talks of Session 4 of TED2017
Session 4 of TED2017 kicked off with an interview with perhaps the greatest athlete of all time, Serena Williams, and closed with the potentially world-changing announcement of this year's TED Prize wish from Raj Panjabi. In between, the session saw a surprise talk directly from the Vatican by His Holiness Pope Francis -- the culmination of a year of collaboration. The session will likely go down in history as one of TED's most memorable.