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Optical illusion: Even the smartest failed to spot the hidden rat, can you find it in 15 seconds?

A viral optical illusion challenges users to find a hidden rat in under 15 seconds, with most failing despite repeated attempts. This brain teaser highlights how visual clutter and camouflage can trick perception, sparking online debate. Psychologists note such puzzles test attention and visual processing, often used for quick IQ assessments.