Optical illusions are spreading like wildfire on the internet, including social media platforms. These challenges are interesting as they teach you to look beyond mere appearance to solve a problem.

Optical illusions are going viral these days. One challenge that is grabbing attention online will perfectly test your ability to pay attention to detail. In the optical illusion, the word ‘sand’ ...

You look at an image of a black circle on a grid of circular dots. It resembles a hole burned into a piece of white mesh material, although it’s actually a flat, stationary image on a screen or piece ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images ...