Pre-Columbian peoples in the Amazon built extensive earthworks and created fertile 'terra preta' soil.
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The Sumerians developed one of the earliest known writing systems.
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The saber-toothed tiger is more accurately called Smilodon.
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Fossilized bones reveal information about prehistoric diets.
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Monoclonal antibody therapies treat various diseases.
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Cats have a reflective layer in their eyes that improves night vision.
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The human stomach can expand significantly after a large meal.
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The Arctic hare has short ears to minimize heat loss.
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