National Geographic Society

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Deadly Avalanches

Host Ben Fogle explains how that thick slab of snow weighed 300 thousand tons and was traveling at more than a hundred and fifty miles an hour.

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Avalanches take nostalgia away from fresh snow powder – engulfing entire towns and crippling major cities. The raw power of snow and ice is put to the test in a state-of-the-art climate chamber by avalanche experts, showing how the smallest changes to snow and ice crystals can lead to catastrophic destruction.