A new visual puzzle challenges readers to find a hidden chick among a flock of sheep. The illusion plays on the brain's ...

An optical illusion is a shape-shifting, mind-bending vision of a person, object, or drawing that tricks the brain into believing something different. The fact that a typical human brain can perceive ...

The Parthenon is a gem of ancient Greek architecture for its perfect appearance, but its perfection results from optical ...

After discussing the quirks in 3D modeling software, where a laser beam is treated as a solid object that can cast a shadow, scientists decided to experiment in real life — and found that laser beams ...