Wow Cat Play Piano

There’s no evidence that the cat piano was ever made, writes Lucas Reilly for Mental Floss, but here’s how it would work in Kircher’s own words (translated from the original Latin). The player of such a piano would select "cats whose natural voices were at different pitches and arranged them in cages side by side, so that when a key on the piano was depressed, a mechanism drove a sharp spike in the appropriate cat’s tail."