Columbian Exchange: The widespread exchange of plants, animals, diseases, ideas, and technologies between Europe and the Americas following Christopher Columbus' voyages.
Vasco da Gama: A Portuguese explorer who successfully sailed around Africa's Cape of Good Hope to establish a direct sea route from Europe to India.
Treaty of Tordesillas: A 1494 agreement between Spain and Portugal that divided newly discovered lands outside Europe along an imaginary line, granting Spain control over most of the Americas and Portugal control over Africa and Asia.