When an ancient three-barrelled cannon was discovered by schoolchildren, museum officials would have known they had stumbled on a rare find. But now, 40 years after the discovery of the unique weapon, they have learned just how important it is - the gun is a prototype designed by Leonardo Da Vinci himself. The cannon was discovered in a Croatian fort, but only now has it been confirmed it was designed more than 500 years ago by the artist and inventor. Read more here !
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