Benjamin Franklin conducted his famous kite experiment on June 10, 1752, during a thunderstorm, proving that lightning is a form of electricity. By flying a kite with a metal key attached to the string, he demonstrated electrical conduction, which led to the invention of the lightning rod, significantly advancing our understanding of electricity and enhancing public safety. Franklin’s experiment remains one of the most iconic in the history of science, symbolizing the power of innovative, empirical research.