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Tornadoes touch down in Alabama as storm moving across the country brings snow, ice, flooding and extreme winds

By Judson Jones and Steve Almasy, CNN Millions of Americans were under winter weather alerts, wind advisories or flood watches as a broad storm with a “plethora of weather hazards” raced across the US Thursday. The National Weather Service confirmed two tornadoes touched down about 30 miles north of Tuscaloosa, Alabama, with trees in the

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Volcanoes Fast Facts

CNN Editorial Research Here’s a look at volcanoes, mountains that open downward to a reservoir of molten rock. Facts: More than 80% of the Earth’s surface, both above and below sea level, is of volcanic origin. Lava is molten rock from a volcano that reaches the Earth’s surface. Liquid rock below the Earth’s surface is

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