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.
[citation needed] The term was first used in 1972 by American historian Alfred W. Origin of term[edit] In 1972 Alfred W. Influence[edit] Crops[edit] 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. The show's presentation plot shows a man falling out of a window (from tripping over a Roomba) on to the street below, and being cared for in a futuristic hospital.
The surgeons discover that his out of date artificial heart has been damaged in the three-story fall. Once the insurance company analyzes the data and discovers that the patient tried to essentially scam them, his policy is immediately dropped. The year is 2057. A few moments later, the power is restored and the city jumps back to life. NationalGeographic's Channel.