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.
In 1828, Irving wrote âThe Life and Voyages of Christopher Columbus,â which sounds like a biography but is mostly fiction. It says that Europeans learned from Columbusâs trips to the New World that the planet was round. Letronne insisted that early Christian writers thought the Earth was flat. Though they did not, he was widely quoted for many years. Others, too, helped perpetuate the myth.