Questions tagged [optical-illusions]

for questions about claims based on optical illusions, a phenomena where a visual perception differs from reality.

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What is the commonly accepted mechanism that causes people to experience pareidolia?

I often see cases of pareidolia reported in the news, on blogs, and even here. I think remember reading in Demon Haunted World by Carl Sagan that this had an evolutionary origin (i.e. if you see a ...
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Is the “Face on Mars” an artificial structure?

Is the famous image of a face on Mars a trick of the light or an artificial structure reprinting a face?