It’s a sketch you’ve probably scrolled past dozens of times—an image that can be a duck or a rabbit depending on how you look at it. First published in a German humor magazine in 1892, this now-iconic ...

Ever since it was published in 1892, the rabbit-duck illusion has been perplexing viewers with its remarkable ability to shapeshift. Does it show a rabbit and then a duck, a duck and then a rabbit, ...