Invention that changed the World



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Invention that changed the World



Invention that changed the World
A great invention opens the door to a new era in human history. The stone axe, for example, invented some 2 million years ago in East Africa, enabled us to enter the human path of endless improvements through inventions. The taming of fire enabled us to cook food as well as leave the warmth of Africa and move to the frigid lands of the North.
And now I want to talk about batteries and electricity, because I think that they have changed our life very much and I cannot imagine life without electricity.
Battery electricity has become the basic need for our day to day life, another essential invention. Of course, electricity itself has been here around all along, but the practical applications to effectively use it was invented. Although many use electricity, how many of you know the history of electricity?
Alessandro Volta is generally credited with discovering the first practical battery. He invented his battery in 1799, it consisted of discs of two different metals, such as copper and zinc, separated by cardboard soaked in brine. In 1831, British scientist Michael Faraday discovered the basic principles of electricity generation. The electromagnetic induction discovery revolutionized energy usage. Street lights were some of the earliest attention gaining equipment. With the rise in electricity usability, now it stands as a backbone of modern industrial society.
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