The population of hunter-gatherers never exceeded 10–15 million globally — agriculture enabled population explosion.
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The Aztecs built the city of Tenochtitlan on a lake.
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The Sahara Desert receives less rainfall than most regions.
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Antifreeze proteins allow Antarctic fish to avoid ice crystal formation.
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The 2019–2020 Australian bushfires burned millions of acres.
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The ocean contains structures larger than mountain ranges.
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The Amazon rainforest is often called the lungs of the Earth.
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