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The Pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continents, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during the Early Modern period. While the phrase pre-Columbian era literally refers only to the time preceding Christopher Columbus's voyages of 1492, in practice the phrase is usually used to denote the en
Christopher Columbus' first voyage to the Americas in 1492 launched the era of large-scale contact between the Old and the New Worlds that resulted in this ecological revolution, hence the name Columbian Exchange. This exchange of plants and animals changed European, American, African, and Asian ways of life. Foods that had never been seen before by people became a major part of what they ate. For example, before 1492, no potatoes were grown outside of South America.