Galileo Galilei to Einstein's special theory of relativity. A biography by Galileo's pupil Vincenzo Viviani stated that Galileo had dropped balls of the same material, but different masses, from the Leaning Tower of Pisa to demonstrate that their time of descent was independent of their mass. This was contrary to what Aristotle had taught: that heavy objects fall faster than lighter ones, in direct proportion to weight. While this story has been retold in popular accounts, there is no account by Galileo himself of such an experiment, and it is generally accepted by historians that it was at most a thought experiment
Italian submarine Galileo Galilei was heard by the anti-submarine warfare trawler HMS "Moonstone" who fired a warning signal. At around 16:30, while the submarine was still on the surface, she was attacked by an enemy plane. "Galileo Galilei" was forced to submerge but remained on station considering a rather weak response to her sighting. When the darkness fell, the boat resurfaced to recharge the batteries, but it was discovered by the British ship forcing the submarine to crash dive and go through a brief but intense depth-charge attack which did not cause any damage. In the morning of June 19, while "Galileo Galilei" was