As an ice-core scientist, Alison Criscitiello studies ancient ice for clues about our climate, at the Canadian Ice Core Lab at the University of Alberta. As a high-altitude mountaineer, she climbs mountains all over the world. In the highest risk, highest reward expedition she has ever planned, the National Geographic Explorer heads to Mount Logan in search of potentially 30,000 year-old ice. As it turns out, summiting Canada's highest peak was only the start of the challenge ahead.
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