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Fingers don%u2019t have muscles that facilitate movement. The tendons in our fingers are moved by the muscles of the forearm.Even though space travel didn%u2019t happen until the 1960s, rockets have been around for a long time. The first rocket was invented by the Chinese around the year 1200. Rockets are the oldest of all engines.The first stethoscope was invented in 1816 by French doctor Rene Laennec. He used a long, rolled paper tube to carry the sound from the patient%u2019s chest to his ear.33
