You might have seen the ‘Rotating Snakes’ optical illusion invented in 2003 by Akiyoshi Kitaoka of Ritsumeikan University in Japan before, but have you ever thought what an animal would see when looking at it? Take a look at this cat inspecting the twisty-turny illusion above and then refresh your memory on what it’s looking at below:

The illustration isn’t actually moving above, it just looks like it is. For an explanation as to how this works, read this article on the rotating snakes optical illusion.