It was Galileo himself who first discovered that in a vacuum, if you were to drop two objects from the same height, they'd hit the ground at exactly the same time, regardless of their respective weights. Of course, on Earth, we rarely - if ever - get the change to see this at play, thanks to a phenomenon known as air resistance. The combination of bowling ball and feather is the perfect way to dem
![WATCH: A Bowling Ball And Feather Fall in World's Biggest Vacuum Chamber](https://cdn-ak-scissors.b.st-hatena.com/image/square/d5274c865ab13f55c1930ea5d256aaf3ea5c83c5/height=288;version=1;width=512/https%3A%2F%2Fwww.sciencealert.com%2Fimages%2Farticles%2Fprocessed%2Ffeather-ball_1024.png)