In August 1519, under the leadership of the Portuguese Ferdinand Magellan, 239 sailors left Seville for the Indies. Three years later, only 18 starving and sick sailors returned in the only ship that resisted the journey, led by Spanish sailor Juan Sebastián Elcano. They had taken a world tour; an almost impossible mission that sought a new route to the "spice islands" and that ultimately changed the history of mankind by proving that the earth is round. An achievement that forever changed commerce, economics, astronomy and knowledge of the planet and is considered one of the greatest achievements in history.