NPR: TED Radio Hour

Original broadcast date: July 29, 2016. Failure can be devastating, but it can also make us stronger and smarter. This week, TED speakers explore how failure clears the way for success, in our everyday work, and our innermost lives. Guests include entrepreneur Astro Teller, economist Tim Harford, author Casey Gerald, and writer Lidia Yuknavitch.

What does it take to change the world for the better? This hour, TED speakers explore ideas on activism—what motivates it, why it matters, and how each of us can make a difference. Guests include civil rights activist Ruby Sales, labor leader and civil rights activist Dolores Huerta, author Jeremy Heimans, "craftivist" Sarah Corbett, and designer and futurist Angela Oguntala.

Original broadcast date: March 4, 2016. What makes an idea, a brand, or a behavior catch fire? This hour, TED speakers explore the mysteries behind the many things we spread: laughter and sadness, imagination, viruses and viral ideas. Guests include neuroscientist Sophie Scott, entrepreneur Seth Godin, philanthropist Bill Gates, social scientist Nicholas Christakis, and historian Yuval Harari.

Racism isn't always obvious, but it can be found almost everywhere. This hour, TED speakers explore the effects of everyday and systemic racism in America—and how we can work to defeat it. Guests include authors Brittney Cooper and Monique Morris, journalism professor Pat Ferrucci, clinical psychologist Howard Stevenson, and anti-racism educator Travis Jones.

Original broadcast date: June 19, 2015. We live our lives by the calendar and the clock, but time is also an abstraction, even an illusion. In this hour, TED speakers explore how our sense of time changes depending on who and where we are. Guests include director Cesar Kuriyama, poet Rives, psychologists Dan Gilbert and Laura Carstensen, and cosmologist Sean Carroll.