“Brett's big challenge was standing on the ice in bare feet at the other side before beginning his return trip across the slackline,” says photographer Andrew Peacock, who took this photo of slackliner Brett Winterbottom at Matanuska Glacier, Alaska. https://on.natgeo.com/2rZWkmv

“Brett's big challenge was standing on the ice in bare feet at the other side before beginning his return trip across the slackline,” says photographer Andrew Peacock, who took this photo of slackliner Brett Winterbottom at Matanuska Glacier, Alaska. https://on.natgeo.com/2rZWkmv 

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