This will then disappear and you may see the traditional red, white, and blue flag. The video was ... in 12 men and one in 200 women. How can optical illusions and brainteasers help me?

Optical illusions come in all forms, from classic illustrations to minimalist modern art, but one category that continues to ...

The latest image making the rounds on the r/opticalillusions subreddit is a fairly innocuous snap of two high-rise buildings.

So, when looking at the green part of the illusion, it is the green and blue cones that get fatigued and fail to respond properly when the white screen flashes up. But the red cones that were not ...