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Biomechanics is the study of the structure, function and motion of the mechanical aspects of biological systems, at any level from whole organisms to organs, cells and cell organelles, using the methods of mechanics.
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The core is made of two layers – the inner and outer core. ...
The mantle is about 1,800 miles (2,900 kilometers) thick and makes up about 85% of the Earth's weight.
The crust is an outer solid layer and is where life as we know it exists with mountains, sea and soil.
The Earth is mostly made of rock and metal. As scientists can’t really get right to the middle of the earth, it’s not easy for them to know what’s way down in the middle.
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The quotation showed the struggling relationship between President Jackson and Vice President Calhoun in Jackson's first-term. While Jackson tried to end the cabinet wives' oppositions of the secretary of war John Eaton's controversial marriage, Calhoun chose to stand with his wife who was the anti-Peggy ringleader. The infamous dispute would almost have destroyed Jackson's achievements in his first term unless Martin Van Buren had sacrificed his position at State Department by resigning, which allowed Jackson to remove his anti-Eaton cabinet members. Calhoun was not renominated for vice president and resigned shortly before the end of his term.
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The Age of Exploration had a significant impact on geography. By traveling to different regions around the globe, explorers were able to learn more about areas such as Africa and the Americas and bring that knowledge back to Europe.
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