September 20th: On this day in history, a Spanish expedition led by Portuguese navigator Ferdinand Magellan set off on the 1st successful circumnavigation of the earth, proving that yes, it is in fact, round.

The voyage took almost three years and claimed 18 out of the original 270 sailors’ lives along the way, including Magellan himself.

Watch the video below to learn all about this famous voyage and respond in the comments section with the fact that you liked the most.