tagged with: optical illusion, motion illusion, circles that appear to move, words and unwords, illusion, are you seasick yet, psyche, perception, geek humor, seasickness
Showcase your wry optical illusion attitude with a dose of scientific humor with any of these gifts featuring the infamous motion illusion -- where the circles start to move as you stare at them -- along with the following caption: "Are You Seasick Yet?" Classic geek humor at its best!
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