Was Galileo Galilei the first "real" physicist? Before Galileo, I don't think there was physics in the way we think of it today. It seemed that physics was more of a philosophy to the Greeks and Romans, who just came up with theories and didn't try to prove them through experiment. In my opinion, the theories that turned out to be right were no more than lucky guesses (although admittedly some of the theories were "deduced" through logic and common sense). The Question: Was Galileo Galilei the first "real" physicist? In other words, was he the first physicist to test his theories through experiment?