If you’ve spent much time on the internet over the past decade or so, you’ve probably seen the optical illusions of Zach King. The 31-year-old illusionist and internet personality has a YouTube ...

Do you think you trust people deep down? An optical illusion may reveal your true feelings. A YouTube video asked viewers to choose whether they saw a face or a tail in a cartoon image – so what do ...

Two common animals are hidden in a revealing optical illusion, and which you see first reveals secrets about your personality. Is your head in the clouds, or are you firmly grounded here on Earth? The ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

Like any magic trick, this optical illusion requires careful planning and a particular perspective. A hand places a metal ball at the bottom of a 3D printed slide and the ball immediately rolls uphill ...