Image: Nut & Bolt Illusion
Size of this preview: 800 × 480 pixels. Other resolutions: 320 × 192 pixels | 812 × 487 pixels.
Original image (812 × 487 pixels, file size: 274 KB, MIME type: image/jpeg)
Description: Invented by Jerry Andrus, this optical illusion is called Nuts & Bolts. You see it here at the Skeptic Toolbox, Eugene, OR 2001
Title: Nut & Bolt Illusion.BMP
Credit: Own work
Author: Sgerbic
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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