Mark Fisher1 / 11
Climbing guide Dawa Yangzum Sherpa ascends a ladder while traversing the route to Everest's summit as part of the National Geographic and Rolex Perpetual Planet Everest Expedition.
Mark Fisher2 / 11
Climate scientists Baker Perry, Tom Matthews, and a team of Sherpa guides build the highest weather station in the world at the Balcony on Mount Everest as part of the National Geographic and Rolex Perpetual Planet Everest Expedition.
NGHD3 / 11
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Dirk Collins4 / 11
Mariusz Potocki and members of the National Geographic and Rolex Perpetual Planet Everest Expedition team collect the highest ever ice core at 8,020 meters, near the South Col.
Mark Fisher5 / 11
Members of the National Geographic and Rolex Perpetual Planet Everest Expedition ascend a slope on Lobuche as part of their acclimatization before making their way toward Everest's summit.
Brittany Mumma6 / 11
Geologist Peter Strand collects rock samples near Everest Base Camp as part of the National Geographic and Rolex Perpetual Planet Everest Expedition.
Brittany Mumma7 / 11
An avalanche touches down at Everest Base Camp, a frequent occurrence that the National Geographic and Rolex Perpetual Planet Everest Expedition team grew accustomed to seeing while conducting their research.
Mark Fisher8 / 11
Chris Millbern operates a drone at Everest Base Camp as part of the National Geographic and Rolex Perpetual Planet Everest Expedition team's efforts to develop a detailed map the Khumbu Glacier.
NGHD9 / 11
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Mark Fisher10 / 11
At 8,430 meters above sea level, members of the National Geographic and Rolex Perpetual Planet Everest Expedition team celebrate after setting up the world's highest operating automatic weather station.
Mark Fisher11 / 11
Climbers descend the Khumbu Icefall, a notoriously dangerous section of the summit route that several members of the National Geographic and Rolex Perpetual Planet Everest Expedition had to travel through as part of their work to conduct the most comprehensive single scientific expedition in the history of the mountain.