Wednesday, Dec. 10, 7-8 p.m. – The American Civil War brought out the best creative minds, North and South, as each side adopted new technology in their quest for victory. Historian Michael K. Shaffer discusses the military’s use of aeronautics, submersibles, the telegraph and more. Free. Open to the public. In the Garden Room, Heritage Sandy Springs Museum, 6075 Sandy Springs Circle, Sandy Springs, 30328. For more information visit: www.heritagesandysprings.org  or call 404-851-9111.