The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population:)
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a. A. Zheng He's various expeditions
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I hope that this helps
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location
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near water sources = positive
Anthropology is the study of culture
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The Aztecs were very advanced scientific thinkers and mathematicians. The Aztec number system was far more advanced than other cultures at the time. Aztec astronomy was also an important component of their calendar, which reflected heavily on their gods. The Aztecs were also advanced in the development of medicine. Hope that helps and don't forget to friend me, okay?