Cryosol | Soil Monoliths Cryosols (or Gelisols in USDA Soil Taxonomy) have permafrost either within 1 m of the surface or within 2 m if the pedon is strongly cryoturbated in the active layer. Monoliths.soilweb.ca
Among the ancient Greeks, Homer thought the world to be flat. In contrast, Pythagoras postulated that the earth was round. A century later, Aristotle sided with the theory of the roundness of the earth.
The myth of the flat Earth is the modern misconception that the prevailing cosmological view during the Middle Ages in Europe was that the Earth is flat, instead of spherical. During the early Middle Ages, virtually all scholars maintained the spherical viewpoint first expressed by the Ancient Greeks.