Ancient Egyptian pyramids were aligned to within 3/60 of a degree of true north using stellar observation.
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Ancient Greece made contributions to mathematics and philosophy.
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In 1848, a false report of gold in North Carolina briefly triggered excitement before the California Gold Rush.
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The Ice Age saw fluctuating climate conditions.
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The Indus Valley Civilization built advanced drainage systems.
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Ancient Egyptians developed advanced techniques in engineering.
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The Vikings explored parts of North America centuries before Columbus.
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The Mongol Empire became the largest contiguous land empire in history.
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In 1962, a U.S. submarine nearly launched a nuclear torpedo during the Cuban Missile Crisis.
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