Ultramarathoner Hikes Appalachian Trail In Record Time
Scott Jurek recently hiked the Appalachian Trail in record time. His journey through 14 states took 46 days, 8 hours and 7 minutes.
How do you study the upper limits of human endurance? Professor Herman Pontzer of Duke University tracked long-distance athletes running across the country. He talks with NPR's Lulu Garcia-Navarro.