Answer:
Ferdinand Magellan
Step-by-step explanation:
Ferdinand Magellan was first man to circumnavigate the earth. A Portugese who lived from 1840- 1521. He died on course his voyage around the earth in the year 1521. His exploration of the earth provides the proof that the earth is a round planet and not actually flat. Magellan's expedition strongly bolstered the round earth theory as against the conventional conception in those days that the earth is flat.
His voyage spanned three years between 1519 and 1522.