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
Center for the Study of Democracy (Bulgaria) Center for the Study of Democracy (Bulgaria) This article is about the Center for the Study of Democracy in Bulgaria For the other institution by the same name, in the United States, see the Center for the Study of Democracy at St. Mary's College of Maryland, USA. Founded in late 1989, the Center for the Study of Democracy (CSD) is an interdisciplinary public policy institute dedicated to the values of democracy and market economics, based in Bulgaria. The CSD is a non-partisan, independent organization fostering the reform process in Bulgaria through impact on policy and civil society, and is one