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
Society for the Study of the Sudans UK Centre in Rutland Gate. More recently, international conferences have been convened in collaboration with the U.S.-based Sudan Studies Association (SSA) in Durham, England (2000), Washington DC (2003), Bergen, Norway (2006), Pretoria (2009) and Bonn (2012). Sandy Sanderson was the Society's second president, followed by the Sudanese novelist Tayeb Salih. The name was changed in 2016 to reflect the independence of South Sudan. Society for the Study of the Sudans UK The Society for the Study of the Sudans UK (SSSUK) is the largest UK-based professional association for scholars of Sudan and South Sudan. Founded in 1986, the Society's "overall aim