If you find this sort of thing interesting, then strong recommendation for "1493", by Charles C. Mann. A reference to 1492, the year that Columbus landed in th

If you find this sort of thing interesting, then strong recommendation for "1493", by Charles C. Mann. A reference to 1492, the year that Columbus landed in the Western Hemisphere, this book is all about the Columbian Exchange. The effects of plant, animal, and microbial species suddenly flowing all throughout a world that until that moment had quite separate and isolated biospheres.