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The rifle was created in mid 15th century although it doesn't say who exacutally created it.
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The printing press was created by Johannes Gutenberg, he was also credited with the first printed book
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The first telescope was created by a italian scientist Galileo Galilei. He was the first man to see craters on the moon, sun spots,the moons of jupiter and saturn's rings
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the first microscope was created by Galileo and it had a focusing lens
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Grand Duke of Tuscany, Ferdinand II was the first person to enclose the theremometer in a glass tube making it look like what we have today
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Evangelista Torricelli was the man who created the barometer but it was again Galileo who played a part. He suggested the idea to use mercury.
