Why your brain flips over visual illusions

About why some visual illusions flip (for some people).

See also: http://www.heraldsun.com.au/news/right-brain-v-left-brain/story-e6frf7jo-1111114603615
"do you see the dancer turning clockwise or anti-clockwise?"

 

 

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Why your brain flips over visual illusions

via New Scientist - Online News on 9/3/10

What happens in your brain when you view illusions in which two separate images can be seen?

 

 

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