HOF Episode 20: The Columbian Exchange
For millions of years, the two main hemispheres of planet earth were separated by an impassible ocean. North/South America and Eurasia/Africa, two divergent ecosystems, food chains, and human civilizations. . . Then one day in 1492, a guy named Columbus passed that impassible ocean, and began the momentous and tumultuous process of bringing the Old … Continue reading "HOF Episode 20: The Columbian Exchange"
