Mysteries: Chewing Gum and U2 Spy Pictures

Don Wildman examines a strange substance that was first used to make chewing gum, a medallion containing deadly poison and a bizarre carving that could re-write the history of America’s discovery.

The Westford Museum houses a massive, oval-shaped boulder. Etched upon its surface are crude images: a boat, an arrow and numbers. Some believe the object is evidence of one explorer’s epic journey … that may rewrite the very history of the nation.