Loom your head toward, and away, from the center point. Print it out and bring to a bar, and it is even more impressive -- the paper appears to be twisting in your hands.
Some other time I'll tell you my speculation for why it works. (It is a
perceiving-the-present explanation.)
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Mark Changizi is Director of Human Cognition at 2AI, and the author of books such as The Vision Revolution (Benbella, 2009) and Harnessed: How Language and Music Mimicked Nature and Transformed Ape to Man (Benbella, 2011).
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