This is a fun personality challenge that asks participants to spot a hidden smiling face among neutral expressions in an optical illusion. People who are optimists are expected to find the smile ...

Of the six billion emoji that are sent globally every day, around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent are sad expressions.

Discover how our brains process images in just milliseconds and identify the one smiling face among frowns in nine seconds. Visual puzzles are known to enhance brain health and demonstrate ...

Optical illusions are visual puzzles designed to trick the human mind and challenge its ability to notice fine details. These ...