Continental drift Continental drift Continental drift is the theory that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed. The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his theory was rejected by many for lack of any motive mechanism. Arthur Holmes later proposed mantle convection for that mechanism. The idea of continental drift has since been subsumed by the theory of plate tectonics, which explains that the continents
International Society for the Interdisciplinary Study of Symmetry on 2013, planned to take place every two years. This series is co-organised with the Research Group on Universal Logic: The Society is governed by a number of special Boards and Committees. The President of the International Society for the Interdisciplinary Study of Symmetry is Dénes Nagy. Among the Honorary Members of the Society are: Honorary Members of the Society (passed away) International Society for the Interdisciplinary Study of Symmetry The International Symmetry Society ("International Society for the Interdisciplinary Study of Symmetry", abbreviated name SIS) is a non-profit organization registered in Hungary (Budapest, Vármegye u. 7. II. 3., H-1052). Its