Exploration
In the Pacific Ocean, Jorge de Menezes (c. 1498–?), discovered Papua New Guinea. García Jofre de Loaísa (1490–1526), discovered the Marshall Islands. Explorations of the Americas began with the initial discovery of America by Christopher Columbus (1451–1506), who led a Castilian (Spanish) expedition across the Atlantic, discovering America. After the discovery of America by Columbus, a number of important expeditions were sent out to explore the Western Hemisphere. This included Juan Ponce de León (1474–1521), who discovered and mapped the coast of Florida; Vasco Núñez de Balboa (c. 1475–1519), who was the first European to view the Pacific Ocean from American shores (after crossing the Isthmus of Panama) confirming that America was a separate continent from Asia; Aleixo Garcia (14?–1527), who explored the territories of present-day southern Brazil, Paraguay and Bolivia, crossing the Chaco and reaching the Andes (near Sucre).
Christopher Columbus
The scholar Amerigo Vespucci, who sailed to America in the years following Columbus's first voyage, was the first to speculate that the land was not part of Asia but in fact constituted some wholly new continent previously unknown to Eurasians. His travel journals, published 1502–04, convinced German cartographer Martin Waldseemüller to reach the same conclusion, and in 1507—a year after Columbus's death—Waldseemüller published a world map calling the new continent "America" from Vespucci's Latinized name "Americus". According to Paul Lunde, "The preoccupation of European courts with the rise of the Ottoman Turks in the East partly explains their relative lack of interest in Columbus's discoveries in the West."