Remember that day in school when the lesson was about the acceleration of free falling objects. The science teacher asked an interesting question. If you dropped a feather and a hammer out the window at the same time, which would hit the ground first? According to Galileo, all things should fall at the same rate, regardless of their weight, right? That’s a valid theory and it was actually illustrated at the end of the Apollo 15 moon walk. In 1971 astronaut, David Scott, performed the experiment and had both items land simultaneously.