Hammer and feather drop: Click [http://upload.wikimedia.org/wikipedia/commons/3/3c/Apollo_15_feather_and_hammer_drop.ogg here] to see Apollo 15 astronaut David Scott on the Moon recreating Galileo's famous gravity experiment. | Hammer and feather drop: Click [http://upload.wikimedia.org/wikipedia/commons/3/3c/Apollo_15_feather_and_hammer_drop.ogg here] to see Apollo 15 astronaut David Scott on the Moon recreating Galileo's famous gravity experiment. |