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.
I've heard it numerous times, that in the old days people thought that the world was flat. Most commonly I heard this in connection with the voyage of Columbus, that he believed the earth to be a sphere while most other people thought he must fail to reach India as the world is flat.