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20th century Age of Steam American ancient Egypt anesthesia artificial BALLOONING Barbie battery became began bicycle bombs boom born BOUNCY built calculators caravel cotton gin crash dates back device that allows dolls dynamite electric eleven-year-old invented ENIAC EVERYDAY ITEMS faster flying machines fuel cells FULTON'S FUN AND GAMES games were played gasoline engine giant glass Gottlieb Daimler Greeks guitar helicopter Henry Ford internal combustion engine inventor has created Kinetoscope laser beam late 18th century launched lightbulb liner magnify objects medicine's Mestral microchip miles per hour modern Montagu movable type Nobel nuclear operate paper patented phonograph pilot plane plastic popular puter radio signals replaced Robots rocket roller skate scientist Sikorsky silicon chip SMART MACHINE Space Invaders space satellite sport steam-powered streetcar surgery Thomas Edison invented tinfoil tion Today Today's top speed transistor transport turies ular Vacuum cleaners Velcro wheel X ray yo-yo