Secret History of Gold

Gold's appeal and value span time and cultures, but there is a little-known secret to the story of gold. Most of the gold mined throughout history remains in circulation today -- even the gold closest to your heart may have dark origins. From the Amazon jungle to the markets of Dubai, National Geographic examines the underbelly of the modern gold trade with a treasure hunter and an illegal miner to expose its volatile history.

• documentary
• nonfiction