In 1902, one year after Willis Carrier graduated from Cornell University, the first modern air conditioner was in operation

By definition beauty is a quality present in a thing or person that gives intense pleasure or deep satisfaction to the mind. For centuries, inventors have come up with ways to improve upon what mother nature has provided.
Developed by the ancient Chinese, fireworks are the oldest form of rockets and the most simplistic model of a rocket powered by gunpowder. Photo: Mary Bellis
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