Pyroclastic flows: The secret of their deadly speed - nature video

1. Pyroclastic flows: The secret of their deadly speed  nature video
2. Pyroclastic Flows May Spread Swift Death on a Cushion of Air  Gizmodo
3. Pyroclastic Flows From Volcanic Eruptions Surf on Self-Generated Layer of Air  Newsweek
4. Volcanic 'avalanches' glide on air, boosting their deadly speed  National Geographic
5. Deadly Volcanic Flows Glide on Their Own Cushion of Air  Scientific American
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