An innovative National Geographic expedition collected the world’s highest ice core from Mount Everest. Mariusz Potocki (center with orange goggles) and the National Geographic and Rolex Perpetual Planet Everest Expedition team collect the highest ever recorded ice core sample at the South Col Glacier. Credit: Dirk Collins, National Geographic and Rolex Perpetual Planet Everest Expedition, read more An Ice Core from the Roof of the World – EOS – P. Mayewski & M. Potocki