“How do you keep going? Why don’t you quit?”

Kevin Vallely was at his wit’s end when he read the email message. He was sitting in his tent in the middle of Antarctica, halfway through his ski to the South Pole when the message appeared on his screen. It caught him completely off-guard. Kevin was part of a three-man Canadian team attempting to break the world record for the fastest unsupported ski traverse from the edge of the Antarctic continent to the geographic South Pole, a brutal 660-mile journey across one of the harshest environments on the planet. And Kevin was completely exhausted.

It was three days before Christmas, and Kevin would be spending the holiday away from his two young daughters for the first time. Every time he’d speak to ...

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