Trevor BeattyJan. 30, 2009The Columbian ExchangeSummary:280 to 225 million years ago all of the world was one big landmass called Pangaea. It then separated but was brought back together when Columbus landed in the Bahamas in 1492. With Columbus’ arrival, plant, animals, and bacteria (diseases) began to mix- called COLUMBIAN EXCHANGE. Things that were exchanged include: diseases, pests, livestock, pets, crops like coffee, sugar, tobacco, potatoes, maize (corn), and some popular drugs. The history of the world was changed forever.DISEASE: There weren’t many diseases in the Americas before the Europeans came because there were few domesticated animals which carry diseases and since the first Americas lived up north in Siberia where it is very cold, the cold weather killed off disease germs. Meanwhile in Asia and Africa, the domestication of herd animals brought lots of diseases by cattle, sheep, pigs, and birds. The diseases brought to the Americas by Europe killed 90% of Indians because they had no immunities. This loss is considered to be the largest demographic disasters in human history. It rocked the regions ecological and economic balance. Consequently, forests regrew and previously hunted animals increased in number. Also, the killing of so many Indians caused a drastic labor shortage throughout the Americas---- leading to African slavery in the Americas.Diseases that Indians had before Europeans came were syphilis, tuberculosis, and arthritisCROPSCrops also upset the balance of the Americas. Europe brought crops such as: wheat, barley rye, cotton, tobacco, sugar, bananas, and citrus fruits. At first the crops didn’t grow very well, but eventually they flourished.