A cabbage butterfly caterpillar. For tens of millions of years, these critters have been in an evolutionary arms race with plants they munch on. The end result: "mustard oil bombs" that also explode with flavor when we humans harness them to make condiments. Courtesy of Roger Meissen/Bond LSC hide caption

itoggle caption Courtesy of Roger Meissen/Bond LSC

Horses, riders and runners crossed three streams in the course of their 22-mile race through the hills of central Wales. The average finish time was the same for both species — four hours. Ryan Kellman and Adam Cole/NPR's Skunk Bear hide caption

itoggle caption Ryan Kellman and Adam Cole/NPR's Skunk Bear

Theoretical Physicist Sean Carroll asks why does time exist? Marla Aufmuth/Courtesy of TED hide caption

itoggle caption Marla Aufmuth/Courtesy of TED

Psychologist Laura Carstensen explains why growing older also means growing happier for so many people. Michael Priest Photography/Courtesy of TED hide caption

itoggle caption Michael Priest Photography/Courtesy of TED

"Human beings are works in progress that mistakenly think they're finished," says psychologist Dan Gilbert. Ryan Lash/Courtesy of TED hide caption

itoggle caption Ryan Lash/Courtesy of TED

Cesar Kuriyama explains his app 1 Second Everyday at TED. James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED

Joy (left, voiced by Amy Poehler) and Sadness (voiced by Phyllis Smith) catch a ride on the Train of Thought in Pixar's Inside Out. The movie opens in theaters nationwide June 19. Disney/Pixar hide caption

itoggle caption Disney/Pixar

Artist Honor Harger says Jupiter sounds like "ocean waves breaking up on the beach." Robert Leslie/Courtesy of TED hide caption

itoggle caption Robert Leslie/Courtesy of TED

TED Radio Hour

Honor Harger: What Does Space Sound Like?

Sound artist Honor Harger spent the last few years listening to the stars and recording some of the sounds of space.

Listen Loading…
  • Playlist
  • Download
  • Embed
    Embed <iframe src="http://www.npr.org/player/embed/411729764/412207623" width="100%" height="290" frameborder="0" scrolling="no">

TED Prize winner Dave Isay speaks at TED2015. Bret Hartman/Courtesy of TED hide caption

itoggle caption Bret Hartman/Courtesy of TED

Medical ethicist Harvey Fineberg says "neo-evolution" is on the horizon. James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED

"We can harness our bodies' own abilities that are kind of kept under wraps to allow the aging process to be slowed down." - Biochemist Cynthia Kenyon James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED