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Why do we see illusions? - Mark Changizi

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Why can’t our extremely complex eyes render simple optical illusions? Surprise, surprise -- it comes back to the brain, which has only evolved to encounter natural stimuli. At TEDYouth 2012, Mark Changizi explains how the brain reckons with optical illusions.

Sometimes, even though images are completely static, they can appear to move on a page.

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  • Educator Mark Changizi

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