For centuries, Africa was known to Europeans as "the Dark Continent," not so much for the complexion of many of its native inhabitants inasmuch as for the fact that its interior remained largely unexplored. With the Age of Exploration came the full exploration of the interior of Africa, though little, if any, of the Europeans who mapped it likely knew that they weren't the first outsiders to do so. Long before such European countries were even concepts, a group of hearty and intrepid seafarers originally from the Middle East set off from their base of operations in what's now Tunisia to do just that. Tune in to find out how they did it in this week's enthralling episode!