FARGO - When Dave Hanson heard that the theme to this year's Plains Art Museum's Spring Gala would be "optical illusions," a light bulb went off in his head. On Saturday night, that bulb will ...
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22 mind-boggling optical illusions
Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...
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