Columbian Exchange. The Columbian Exchange or Grand Exchange refers to the widespread transfer of animals, plants, culture, human populations, communicable diseases, technology and ideas between the American and Afro-Eurasian hemispheres in the 15th and 16th centuries, related to European colonization and trade (including African/American slave trade) after Christopher Columbus' 1492 voyage.[1] The contact between the two areas circulated a wide variety of new crops and livestock, which supported increases in population in both hemispheres.
Traders returned to Europe with maize, potatoes, and tomatoes, which became very important crops in Europe by the 18th century. Similarly, Europeans introduced manioc and peanut to tropical Asia and West Africa, where they flourished and supported growth in populations on soils that otherwise would not produce large yields. BBCWorldwide's Channel. BBCWorldwide's Channel. 2057 (TV series) 2057 is a Discovery Channel television program hosted by theoretical physicist Michio Kaku.
It premiered on January 28, 2007 and attempts to predict what the world will be like in 50 years based on current trends. The show takes the form of a docu-drama with three separate episodes, each having informative stories ingrained into the plot. All three episodes aired on January 28, 2007. The first episode, "The Body", predicts medical advances from robotic surgery to flying ambulances. NationalGeographic's Channel.