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, ...

Study of man often featured in works by the Flemish master reveals hidden painting of woman beneath model’s beard ...

Illusions aren’t just fun to look at — they reveal how your brain really works. One famous image, which looks like both a duck and a rabbit, shows how your mind makes choices without you even noticing ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Andriy Onufriyenko via Getty Images Though optical illusions come in all shapes and ...