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Edison's Light Bulb

Thomas Edison’s most famous innovation created light that’s used in everyday life. Edison wanted to create a practical light bulb that lasted longer and used less power. His team in Menlo Park, New Jersey, eventually turned to testing carbon, an element that conducts electricity. It proved successful on October 21, 1879, when Edison’s incandescent bulb lasted close to 14 hours.

First U.S. Postal Service Mail Truck

U.S. mail delivery began by foot and progressed to horse and buggy and train. At the top of the ... more

Robots in Popular Entertainment

The world’s fascination with robots has been around since 1495 when it’s believed Leonardo ... more

Colt Revolver

Samuel Colt’s Paterson revolver was patented in 1836. The five-shot gun could be fired without ... more
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