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 ...

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 ...

Have you ever wanted to make drawings that seem to jump right off the page now you can create these eye-catching images yourself with Drawing Amazing Optical Illusions, a book made specifically for ...