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) afterChristopher 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

the Colombian exchange

the corn is harvested in Africa, Europe and Asia