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.
Itâs a far too common myth that people thought the world was flat before Columbus. Europeans knew the world was round since the Classical period, and civilizations in Asia and Meso-America knew it too. Itâs only recent years, with the illogicalness of religosity in opposition to science that its even become a thing.