 Our audio engineers were Josephine Neonai, Neil T. Volt, Josh Newell, Gilly Moon, and Ted Meebane. Our theme music was written by Ramteen Arablui. Our partners at TED are Chris Anderson, Michelle Quint, Alejandra Salazar, and Daniela Valarezjo. I'm Manoush Zomorodi, and you've been listening to the TED Radio Hour from NPR.