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Thanks to the efforts of Ferdinand Magellan, the first trip around the planet was made, proving that the Earth is round and not plane as many believed.
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Sacagawea, with her 2-months baby helps explorers Lewis and Clark during their expedition through the Rocky Mountains to the Pacific Ocean and Back. She received no compensantion for it.
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By the appointment of Thomas Jefferson, Meriwether Lewis and William Clark explored more than 8,000 miles with the help of Sacagawea. Lewis received his salary, 1,600 acres of land and named governor of Louisiana Territory.