This amazing optical illusion has been put forward as a visual personality test that can reveal whether you’re right-brained or left-brained. That’s totally bogus, of course, but it doesn’t make the ...

A psychology professor has found that the way people perceive the Silhouette Illusion, a popular illusion that went viral and has received substantial online attention, has little to do with the ...

It’ll spin your head right round, right round. This head-spinning optical illusion will have you second guessing your own sanity. It shows two rotating rings made up of six ovals. One is all black ...

A couple of years ago an optical illusion came along and almost broke our site. Over three million people read an article about the most dizzying illusion ever to grace our screens – the rotating ...

I am a big fan of optical illusions; I love 'em (see here and here and here and here). A lot of Bad Astronomy is due to one illusion or another, like the Glass Worm, but that's incidental. I just ...

Optical illusions just keep getting more extreme. We once examined an optical illusion in which a silhouetted figure spins in different directions depending on how you look at it. Here’s the sequel, ...

Optical illusions have fascinated people for centuries. They play tricks on our eyes and brains, making us see things that aren’t really there. Sometimes, a static image can appear to move, or colours ...

The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. Optical tricks can be caused by different ...

I am a big fan of optical illusions; I love ‘em (see here and here and here and here). A lot of Bad Astronomy is due to one illusion or another, like the Glass Worm, but that’s incidental. I just ...