1493 - Charles C. Mann

Two hundred million years ago the earth consisted of a single vast continent, Pangea, surrounded by a great planetary sea. Continental drift tore apart Pangaea, and for millennia the hemispheres were separate, evolving almost entirely different suites of plants and animals. Columbus's arrival in the Americas brought together these long-separate worlds. Many historians believe that this collision of ecosystems and cultures - the Columbian Exchange - was the most consequential event in human history... Zobrazit více