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Caldera Volcano: Yellowstone’s ticking time bomb

Derrick Pitts, chief astronomer and planetarium director at the Franklin Institute Science Museum, joins “CBS This Morning: Saturday” to discuss the Caldera Volacano, a supervolcan... More Derrick Pitts, chief astronomer and planetarium director at the Franklin Institute Science Museum, joins “CBS This Morning: Saturday” to discuss the Caldera Volacano, a supervolcano, that sits underneath Yellowstone National Park. Less

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