Dinosaurs ruled the land for over 160 million years.
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The Wright brothers achieved powered flight in 1903.
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The first successful heart transplant was performed in 1967.
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In 1904, an Olympic marathon included bizarre obstacles and poor organization.
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The Triassic period marked the first appearance of dinosaurs.
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Ancient Egyptians developed hieroglyphic writing.
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The Devonian period is sometimes called the Age of Fishes.
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The Gupta Empire is often called the Golden Age of India.
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In 1942, a mistaken military exercise caused confusion along the U.S. West Coast.
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