The first Europeans to arrive in the Americas were the Vikings in the 11th century, establishing short-lived settlements in Newfoundland. In the 15th century, Christopher Columbus proposed sailing west to reach Asia for Spain and received financing from Queen Isabella and King Ferdinand. While never reaching Asia, Columbus' voyages led to European colonization of the Americas. Over subsequent decades, other European explorers like Ponce de Leon, Balboa, and Magellan further mapped and claimed territory in the Americas for their home nations. The Columbian Exchange resulted in the sharing of crops, livestock, and unintentionally diseases between Europeans and Native Americans.