Sir Isaac Newton and the theory of gravity [Getty Images]

Sir Isaac Newton and the theory of gravity - sitting next to an apple tree with falling apples. English physicist, mathematician, astronomer, natural philosopher, theologian.Wrote Philosophiæ Naturalis Principia Mathematica, published in 1687. 4 January 1643 31 March 1727. (advert for Liebig) (Photo by Culture Club/Getty Images)

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