Modern Marvels

Season 18, Episode 14: Under Pressure

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Every aspect of our lives involves pressure. It's what puts the bubbles in soft drinks, propels shaving cream from its can, cools the contents of your refrigerator, and causes volcanoes to erupt. But when pressure suddenly changes, you better look out! Rapid pressure changes can be as violent as explosions. And variable atmospheric pressure? We call that the weather.