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Galileo built a telescope that was assisted him in making new astronomical discoveries
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Gottfried Leibniz developes the binary number system, which is used in almost every computer today
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Alessandro Volta creates the first battery, known as a "Voltaic pile, in Italy
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William Sturgeon developes the first practical eletric motor
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Christopher Latham Sholes invented the modern typewiter, and the QWERTY key was invented so that people wouldn't type too fast and break the typewriter
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Thomas Edison invented the phonograph, which was the first practical way of playing and recording sound
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Karl Benz invented the first gssoline-powered car
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The Wright brothers were the first people to develope a plane powerd by an engine, which led to the invention of the modern airplane
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The Geiger counter is used to detect radiation, which is very useful
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It began constuction in 1943 in the University of Pennsylvania. It occupied 1,800 square feet and weighed almost 50 tons