Arctic Ascent with Alex Honnold MEGA EPISODE | Climbing a 4,000 Foot Cliff | SPECIAL

Alex Honnold leads a six-week expedition in Eastern Greenland to attempt a first ascent of one of the highest unclimbed rock faces in the world. But this is much more than a climbing trip. With the help of glaciologist Heidi Sevestre, Alex and the team investigate the impact of climate change on the glaciers, ice caps and fjords in this remote part of the Arctic.

Courtesy of National Geographic on YouTube. Watch on YouTube ↗

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