In what country was the man who originally proposed Le Sage's theory of gravitation in 1690 born?
Nicolas Fatio de Duillier Nicolas Fatio de Duillier {'1': ", '2': ", '3': ", '4': "} (also spelled Faccio or Facio; 16 February 1664 – 12 May 1753) was a Swiss-born mathematician, natural philosopher, and inventor. He spent much of his adult life in England and Holland. Fatio is known for his work on the zodiacal light problem in astronomy, for originating the "push" or "shadow" theory of gravitation, for his close association with both Christiaan Huygens and Isaac Newton, and for his role in the Newton v. Leibniz calculus controversy. He also invented and developed the first method for fabricating jewel bearings for mechanical watches and clocks.
Hugo Grotius Hugo Grotius ( ; 10 April 1583 – 28 August 1645), also known as Huig de Groot (] ) or Hugo de Groot (] ), was a Dutch jurist. Along with the earlier works of Francisco de Vitoria and Alberico Gentili, Grotius laid the foundations for international law, based on natural law. A teenage intellectual prodigy, he was imprisoned for his involvement in the intra-Calvinist disputes of the Dutch Republic, but escaped hidden in a chest of books. He wrote most of his major works in exile in France.