Oliva on Instagram: "Before TVs, phones, or movie theaters, people used simple machines like this to watch moving images. You turn the crank, and a stack of pictures flips really fast, just like a flipbook. When the images move quickly one after another, your brain sees it as motion. This was one of the first ways people experienced movies, and it helped lead to the films and screens we use today. . #reels #viral #history #technology #interesting"