Magellan was trying to prove that the earth is round, and was attempting to find a quicker route to the Spice Islands (today’s Indonesia) that would cut the long overland travel route through Asia.
assitant
Magellan left Spain to find a western route to the Spice Islands, hoping to open up a new sea route to trade.
assistant
Who was the first explorer to circumnavigate the globe?
user
There are many different people who have circumnavigated the globe.  Probably the best-known person is Ferdinand Magellan, who sailed around the globe in 1519-1522.
assistant
How long did the full trip take?
user
It took three years.
assistant
Why did you set out to make the voyage?
user