ow the two worlds affected each other; he discusses the things that the two worlds exchange. The swap of various items is the main thesis that Crosby is trying to prove. He gets this point across by comparing and contrasting between the two worlds. As Crosby states Columbus had set out to find Asia by when he got to what he thought was Asia he was "... struck by the strangeness of the flora and fauna of the islands they had discovered" (Crosby 3-4) another contras that Crosby noted was the different animals both worlds introduced to each other. The Europeans marveled at the strange animals the found in American that they had never seen before such as the llama and the buffalo. The indigenous people of the new world were frightened by the new huge animals introduced to them by the Europeans. Another contrast that Crosby points out is the introduction of imported domesticated animals. He spoke of the animals that were brought from the old world to the new world and adapted quickly to the American climate, the rising and grazing of there animals changed the topography of the American landscape considerably. An animal that is focused on in the book is the cattle. The ranching profession became a staple of in the Spanish conquered countries of the new world. The business of exporting cow hides back to the old world was an important part of the development of these counties. It's als
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