Nicholas Steno-Nicholas Steno-Nicholas Steno-Nicholas Steno-Nicholas Steno-Nicholas Steno
Birth: Jan. 11, 1638
Copenhagen, DenmarkDeath: Nov. 25, 1686
Schwerin, Germany
Geologist, Anatomist, Theologian. Born as Niels Stensen. After studies at Copenhagen University, he left Denmark in 1660 to study medicine at the University of Leiden in the Netherlands. After further studies in Paris and Montpelier, he moved to Florens, Italy in 1665. His studies in anatomy attracted the attention of the Grand Duke of Tuscany, Ferdinand II who appointed him to a hospital post that left him ample time for his research which focused at first on the physiology and structure of the heart and the muscles. During travels in Italy he researched the nature of fossils and stated their organic origin. He was a pioneer of modern geology, and his principles of rock layers and the fossils they contain continue to be used today by geologists and paleontologists. In 1667 he converted to Roman Catholicism. In 1675 he was ordained as a priest and two years later as a titular bishop. He spent the rest of his life ministering to the minority Roman Catholic populations in northern Germany, Denmark and Norway. Impact craters on Mars and on the Moon are named after him. In 1988 he was beatified by Pope John Paul II. (bio by: Erik Skytte)