So far, Bryce Carlson has run through the worst conditions imaginable — enduring the heat of the scorching sun, traversing icy roads and resisting stiff headwinds — since beginning his 3,100-mile trek across the country in mid-January.
But the experienced ultrarunner will not quit anytime soon.
"Humans are a lot tougher than we give ourselves credit for," said Carlson, an assistant professor of anthropology at Purdue University. "It's the mental component that's proven more difficult."
Carlson and 11 others started the Race Across USA fundraiser Jan. 16 in Huntington Beach, California.
The goal: Run 117 marathons in 140 days.
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