Some of the strangest and deadliest weapons ever built were prototypes of the modern gun. ANCIENT DISCOVERIES finds out whether a simple bamboo tube could have been the world's first gun. Hidden in an ancient manuscript lays a secret recipe for ancient tracer fire, but does it really work? How far and how high could the mega-mortar "Roaring Meg" have fired its shots to take out a Royalist stronghold? Can a team of experts discover the truth behind the bizarre battlefield phenomena of "wind of the cannonball," when men were seen to drop dead without apparently having been touched by a shot? And did a nine-barreled medieval volleygun mark the birth of the modern machine gun?