Mystery of the Megavolcano (NOVA): Scientists make a shocking discovery --far back in the past, monster volcanoes erupted with cataclysmic violence, far greater than Vesuvius, Pinatubo, Mount St. Helens or any other volcano in recorded human history. Puzzling results from three... (more details for Mystery of the Megavolcano (NOVA))

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File by Kelsobrooks (#2410)
2013-10-29 Grade: 9-10