A Currier & Ives lithograph of Benjamin Franklin and his son William using a kite and key during a storm to prove that lightning was electricity, June 1752. (Photo by Hulton Archive/Getty Images)
A Currier & Ives lithograph of Benjamin Franklin and his son William using a kite and key during a storm to prove that lightning was electricity, June 1752. (Photo by Hulton Archive/Getty Images)