TED Radio Hour

Fridays at 7:00 p.m.

A journey through fascinating ideas, astonishing inventions, and new ways to think and create. Based on riveting TEDTalks from the world's most remarkable minds.

For more information, visit the TED Radio Hour on NPR.

Part 2 of the TED Radio Hour episode To The Edge.

About Bill Stone's TED Talk

Bill Stone is a maverick cave explorer who has plumbed Earth's deepest abysses. In this talk, he explains what it's like to descend into the deepest caves in complete darkness for days on end — and why he keeps doing it.

About Bill Stone

To The Edge

Jul 26, 2013

"Certainly to enter a world of terror, you should not be pushed by someone. You should be called. You should be curious. You should have the heart of an explorer." — Philippe Petit, high-wire artist