MONTRÉAL, CANADA—A cannonball fired in 1759 by the British during the Battle of the Plains of Abraham was unearthed by construction workers in Old Québec. CBC News reports that archaeologist Serge Rouleau alerted the authorities after he realized the 200-pound ball still contained a charge of gunpowder. “With time, humidity got into its interior and reduced its potential for exploding, but there’s still a danger,” said Master Warrant Officer Sylvain Trudel. Such large cannonballs were used to set fire to buildings. This ball is thought to have been fired at Quebec City from Lévis, which is located on the opposite side of the St. Lawrence River. If Trudel’s team can neutralize the weapon without destroying it, it will be preserved and sent to a museum. To read about a fort built in New York during the French and Indian War, go to "Off the Grid: Roger's Island, New York."