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NGravity or how to keep our feet on the ground
English mathematician Sir Isaac Newton has revealed the inverse-square law of universal gravitation. In an interview with the Bridge he said "I deduced that the forces which keep the planets in their orbs must be reciprocal to the squares of their distances from the centres about which they revolve: and so compared the force requisite to keep the Moon in her Orb with the force of gravity at the surface of the Earth; and found them answer pretty nearly.
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