The London Underground is one of the oldest metro systems in the world.
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The Rosetta Stone was discovered in 1799.
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The invention of the compass improved long-distance navigation.
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Cahokia was a large pre-Columbian city in North America.
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Machu Picchu was built by the Inca and rediscovered in 1911.
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Your mind explores reality.
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The Brooklyn Bridge was one of the first steel-wire suspension bridges.
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Abraham Lincoln issued the Emancipation Proclamation in 1863.
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The inattentional blindness phenomenon can hide obvious stimuli.
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