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10 Things You Didn't Know About... Episodes

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  1. Volcanoes

    4/4 Iain Stewart reveals some interesting but little-known scientific facts about volcanoes.

  2. Avalanches

    3/4 Iain Stewart reveals how the deadliest avalanche killed 18,000 people in three minutes.

  3. Earthquakes

    2/4 The stories and science behind some of the world's most dramatic earthquakes.

  4. Tsunamis

    1/4 Iain Stewart explores the most powerful giant waves in history.