The Columbian Exchange Summary

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In the video The Columbian Exchange by John Green taught me all about the changes caused by the contact between the New World and the Old. He teaches this by looking at the history book "The Columbian Exchange" by Alfred Cosby, Jr. when Christopher Columbus "discovered" America, settlers, traders, and European conquerors brought all manner of changes to the used to be isolated continents. Invasive plant, disease, and animal species recreated the New World, mostly in not positive ways. While native plants, animals, and people, were being taken over and replaced by other things in America, everyone else in the world was having positive outcomes from all the American imports, especially foods like blueberries, corn, some fruit, tomatoes, potatoes.