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The article is not relevant but the image is good.

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An interesting article on some of the disturbing psychological effects of being in intensive care. "Puffins jumping out of curtains, firing blood from guns..." was one example.

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What does the Marshmellow test really tell us...

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A series of short illusions put together as a sequence. Some are a little lame but some are very good.

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Just a short video showing how the tree works.

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This has been done before but this site includes a video and an explanation of this T-Rex (some other sites call it a dragon).  There are sites where you can make a cut-out version of this such as: http://www.grand-illusions.com/images/articles/opticalillusions/dragon_illusion/dragon.pdf
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