World Trade and Biological Exchanges Before 1492 by Carl L. Johannessen, John L. Sorenson

World Trade and Biological Exchanges Before 1492

Carl L. Johannessen, John L. Sorenson

604 pages • missing pub info (editions)

nonfiction science informative medium-paced
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People moved into America very early across the Bering Strait. By the fifth millennia B.C.E. tropical sailors brought diseases to America and took plants and animals in both directions. Long before Columbus, tropical sailors carefully selected cro...

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