article_snippet.sent: Scroll down for video .
article_snippet.sent: When you look at the image above, whose face do you see?
article_snippet.sent: On the top row, up close, you can see that the man on the left is scowling, while the woman on the right has a placid facial emotion.
article_snippet.sent: Move back, and the faces change expressions and even genders.
article_snippet.sent: If you squint, blink or defocus, the angry man turns calm, and the calm woman turns angry, and male .
article_snippet.sent: these images superimposed pictures used both male and female faces.
article_snippet.sent: When displayed for 50 milliseconds, participants always saw an angry face, but were unable to pinpoint the sex of the person pictured.
article_snippet.sent: This picture shows an example of a woman's face that turns into a cat at close distance .