Ancient Greeks discovered static electricity in 500-400 BC. Benjamin Franklin conducted experiments with electricity in the 18th century and theorized its polar nature. Alessandro Volta then created the first battery in the early 19th century. This led to discoveries like the electromagnet and electric generator in the early 1800s. Thomas Edison developed the incandescent light bulb in the late 1800s and began powering homes with electricity. Nikola Tesla also developed the AC induction motor and left Edison's company to form his own using alternating current.