 A find heard, if not around the world, at least among U.S. history buffs. Archaeologists near Boston have discovered five musket balls they believe were used at the battles of Lexington and Concord. Park Ranger Jared Fwas. Being able to hold it in your hand and knowing the last person to touch this musket ball was ramming it down the barrel of their gun on the morning of April 19, 1775, it's incredible. S&P Futures, Up 7. This is CBS News.