Watch a Mathematician Effortlessly Fit a Large Circular Disk Through a Smaller Square Hole
Can a large circular disk fit through a small square hole? When you first picture it, it seems impossible. But thanks to Stanford University mathematician Tadashi Tokieda, you'll see that it is possible and easier than you might think. In an enlightening video by Numberphile, he demonstrates this illusion by using a cork coaster and a sheet of paper with a square hole cut into the middle of it.