There are more than 50,000 earthquakes throughout the world every year!
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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Mexico City is built on top of an underground resevoir!
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Every year, Alaska has about 5,000 earthquakes.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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The Sahara desert expands at about 1km per month.
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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
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