Are Kilian Jornet's Speed Records Too Good To Be True?

Are Kilian Jornet's Speed Records Too Good To Be True?
The Spanish ultra-athlete has spent the past decade crushing a generation of elite rivals and redefining the limits of human endurance. But when he notched back-to-back speed ascents of Everest in 2017, critics pounced on the claims.

July 11, 2018 at 10:57AM
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