Sometime around 330 BCE, Pytheas, a little-known Greek merchant, embarked on an astonishing voyage. It was a voyage that would take him far beyond the known boundaries of the Mediterranean, into lands thought to exist only in myth and legend. When he returned, his voyage and the amazing things he had witnessed would be debated for centuries.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/1078/on-the-ocean-the-famous-voyage-of-pytheas/.