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.
on Cape Canaveral. Today it is generally known that the Earth is a sphere, or very close to one (its equator bulges out a bit because of the Earth's rotation). Christopher Columbus too knew that the Earth was round, when he proposed to reach India by sailing west from Spain, he too knew that the Earth was round.