If you want your friend to see you in a crowd, you wave your arms to stand out. As University of Rochester researchers found, one reason why this works is that the brain suppresses the background, ...

OPTICAL illusions are designed to confuse the brain and amaze viewers - and this one could have you baffled for hours. Often, when it comes to illusions, you’ll see something that your friend can’t ...

A woman who spotted something moving in her yard couldn't believe her eyes when it revealed what it was. Neoma Monro, 23, lives in Pennsylvania, where you would not usually expect to see emus ...

Visual motion is an important source of information for separating objects from their backgrounds. A spider camouflaged against a branch, for instance, immediately loses its invisibility once it ...