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Newton, Sir Isaac

     
Newton, Sir Isaac
(1642-1727) a British physicist and mathematician who discovered gravity (=the force that causes things to fall towards the ground or to be pulled towards stars or planets in space). He made many other important scientific discoveries, and is one of the most important scientists who ever lived. Until the early 20th century, modern physics was based on Newton's work, and it is sometimes called Newtonian physics.

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