The Sahara Desert is expanding southward at a rate of about 48 kilometers per year due to desertification.
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Mount Everest is the tallest mountain above sea level.
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The world's deepest lake is Lake Baikal in Russia, containing 20% of the world's unfrozen fresh water.
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Ancient volcanic eruptions shaped prehistoric environments.
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The coldest temperature recorded on Earth occurred in Antarctica.
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The Great Wall of China spans thousands of miles.
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Akrotiri was preserved under volcanic ash on Santorini.
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More people live in Asia than the rest of the world combined.
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The Sahara Desert receives less rainfall than most regions.
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