[Red Badger]

Seafarers of the time, captains and navigators, always knew the world was round, they kept it to themselves. Their instruments were predicated on a round Earth............... 🤔

[Grimmy]

They also knew there was a large land mass in the north and that’s why he took the southern route to try to go “under” that to the east.

[youngidiot]

They knew the earth was round because they could observe ships leaving port and see less and less of the mast until it finally disappeared into the horizon. They could also observe that the moon and sun are round. I don’t believe that there was a widespread belief that the earth was flat.