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Thomas Edison invented the first light bulb on January 27, 1880. Thomas Edison's first cotton filament for the light bulb cost 40,000 dollars to make. His first light bulb was a light dimmer than they are today. It was a cheaper way of lighting and it was safer.

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Thomas Edison invented the first movie camera in 1888.The first movie camera took 12 pictures a second and played it as a movie.The first movie camera was called kinetograph. It provided entertainment.

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The first radio was invented by Gugliemo Marconi in 1895.The first commercial radio was broadcast in 1922. Radio was the first mass medium. It made it easier to communicate.

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Alexander Graham Bell invented the first telephone in 1876. Alexander Graham Bell faced more than 600 lawsuits over his telephone patent.Alexander Graham Bell also made a wireless telephone. It made it easier to communicate.

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Willis Haviland Carrier invented the first air conditioner in 1902. before air conditioners, they used ice so they measured the first air conditioner by how much ice it would have taken to cool the area. the first air conditioner was used as a way to solve a moisture problem for a publishing company. The air conditioner made hot areas and times of the year a lot easier.