https://www.youtube.com/watch?v=bghLhJ-c8os Watch the above presentation from science writer Charles C. Mann (author of 1491: New Revelations of the Americas Before Columbus and 1493: Uncovering the World Columbus Created) and then write an essay in response to the following question: What is the Columbian Exchange and how did the world change as a result of it? Your essay must contain multiple paragraphs and be no less than 500 words in length. Please confine your discussion to the talk given by Mann and, to the extent it is helpful, your textbook. If you feel the need to do some reading outside of those two sources, feel free, but please do not introduce outside sources into your essay. Citations are not necessary. Please paraphrase rather than quote. If you commit plagiarism (including, but not limited to, cutting and pasting text from the web, making slight alterations to it, and presenting it as original work),read your syllabus to find out what those numbers mean, but also please feel free to email me and ask for additional feedback on the quality of both your writing and your historical analysis.