The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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In 1850, only 8% of the people in California were women.
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The state of Florida is bigger than England!
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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Forest fires move faster uphill than downhill.
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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