The Great Divide is the physical region of North America which runs the greatest distance from North to South, it runs along the spine of the <span>mountains from Alaska to South America. It is also known as the Continental Divide of the Americas, going from the Behring Strait to the Strait of Magellen, and covers the Rocky Mountains to the Andes, it is known for being the highest elevation.</span>
They give us informations about our ancestors and how did they live and what did they do and than compare it to present way's of life.
Answer:
because it begins where there is no soil. It can take several hundred to several thousand years to produce fertile soil naturally. The first pioneer species to colonize the bare rock will probably be bacteria and lichens, which can live without the soil.
