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 ...

Add Yahoo as a preferred source to see more of our stories on Google. An example of the neon color spreading illusion. Here, four black circles are besides each other in a square shape. Each circle ...

An Optical Illusion is a type of visual illusion puzzle which is used for fun and challenge. These types of illusions often required different approach for solving these problems because these images ...

While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

Every day, we use our brain to solve problems, think before we act, and interpret the complex world around us. The nonstop biological activities in the various parts of our brain allow us to see color ...