Luigi Galvani, an italian doctor, was examing a dead frog, and realized the frog would move if you put two pieces of metal on it. He predicted that the electricity travelled from the metal, threw the frog, and to the other piece of metal. He was correct. He tryed this again, but this time with lightning. He guessed that the spark of the storm would hit his railing and move threw the hook and toward the frog. This would make it move. He was right. He had now discovered electricity.