The photo features a field with crops stretching till the end of the horizon. Players need to find two children in the image.

The photo features a downspout and a lizard in front of it. Players need to find a second lizard in the image.

Optical illusions play on the brain's biases, tricking it into perceiving images differently than how they really are. And now, in mice, scientists have harnessed an optical illusion to reveal ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception.