The first mammals appeared during the age of dinosaurs.
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Ancient Rome built extensive road networks.
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In 1859, the Carrington Event caused powerful solar storms that disrupted telegraph systems.
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The United Nations was founded in 1945.
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The Great Pyramid of Giza was once the tallest man-made structure.
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In 1518, a dancing plague reportedly caused people in Strasbourg to dance uncontrollably for days.
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The Vikings explored parts of North America centuries before Columbus.
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The 1970 Bhola cyclone was one of the deadliest tropical cyclones.
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The Industrial Revolution transformed manufacturing and transportation.
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