Optical illusions are an important scientific tool because they reveal these shortcuts that brains use to turn raw sensory input into perceptions of reality. When something unexpected happens, ...
Test your sharp vision with a tricky optical illusion. Find the hidden inverted '68' within a grid of inverted '89s'. You ...
The instantly recognisable golden arches of the McDonald's logo appear as an optical illusion cast by lasers and lighting on ...
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