For every action, there is an equal and opposite reaction

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For every action, there is an equal and opposite reaction.

Isaac Newton

January 4, 1643 – March 31, 1727
Sir Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution.