Before the Columbian Exchange, which was only in the Old World?

When Christopher Columbus and his men came to the Americas over 500 years ago, they brought horses, chickens, and wheat bread from Europe. The Native Americans had never seen any of those things before. The Europeans had never seen the potatoes, peanuts, tomatoes, cocoa, or corn grown by the Native Americans.

its many islands, high mountains, and remote peninsulas isolated population centers.

it is a : ) always outside of government control