The average ice berg weighs 20,000,000 tons!
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In 1850, only 8% of the people in California were women.
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Check your map! Virginia extends farther west than West Virginia.
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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The Amazon rainforest produces more than 20% the world's oxygen supply.
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