Zheng He's Massive Treasure Ships
You may not have heard of him, but Chinese explorer Zheng He led expeditions on the largest wooden ships ever built almost a century before Christopher Columbus set sail. Columbus' three ships carried 88 passengers total, while Zheng commanded roughly 30,000 men aboard more than 250 ships.
Key Facts In This Video
Between 1405 and 1433, Zheng He led seven voyages throughout the Indian Ocean on huge treasure ships. (2:00)
The Great Wall of China was built with resources the country had because it shopped building enormous ships. (4:04)
Christopher Columbus navigated unknown water using just the direction he was going, the speed, and the time (which was determined via hourglass). (6:56)