Volcanoes are among the most powerful and awe-inspiring geological features on Earth. They can remain dormant for thousands of years, then dramatically reshape entire landscapes in a matter of hours. Most people recognize famous peaks like Japan's Mount Fuji or Italy's Mount Vesuvius, but the world of volcanology is filled with surprising discoveries that go far beyond the textbook. From a volcano that sledders ride down to one that produces black lava unlike anything else on the planet, here are 10 incredible volcano facts that most people have never heard of.

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