What's Under that Volcano?: Gotta-See Video

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I was at a dinner party last night and the hosts were talking about how they just got bak from Guatemala and had scaled a volcano. While on the mountain they'd jumped into hot holes that had been warmed by the molten rock below the surface, but what was really happening below their feet?

Volcanoes are similar to a giant pimple on the surface of our planet, and sometimes, they pop… via Curiosity 

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