The Copernisis, based on the De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473�1543)
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The hardest puzzle under the Sun | WIRED UK
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Isis Adventure (@IsisAdventure) / Twitter
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Copernisis Metal Brain Teaser w/ Display Box - Gold & Blue Version (discon) - SeriousPuzzles.com
Isis Adventure - Alchetron, The Free Social Encyclopedia
The world famous Isis and Ramisis puzzles - by Sonic Games
Jerry's Mechanical Puzzle & Brain Teaser Collection: Copernisis
The ISIS Puzzle Orb - The Most Difficult Puzzle Ever! | The Green Head
