The Colombian Exchange When Columbus sailed over in 1492 he had no idea how his voyage was going to affect the old and new worlds. Christopher Columbus first journeyed to find Asia brought him to the Americas and forever changed the course of history for both. The exchange of ideas, technology, ...

Hundreds of years ago, Christopher Columbus returned from the New World to the Old World to declare that the world was not flat, but round. Now, in the 21st century, New York Times columnist Thomas Friedman returns from the developing world to the developed world to declare that the world is flat, ...