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Polarized Light (Popularity:  )
Fascinating facts about polarized light, from rainbows to beetles, from viking navigation to LCD displays. ...
Category: Science\Physics\Education\Light and Optics
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Mind Bluff (Popularity: )
A family-friendly collection of tactile illusions, mental deceptions, optical tricks, brain puzzlers, and feeling games ...
Category: Science\Social Sciences\Psychology\Sensation and Perception
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The World of Escher (Popularity: )
The web site to explore the great M.C. Escher artworks. Each image has commentary and ...
Category: Science\Math\Geometry\Sculpture and Art
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Sir Roger Penrose (Popularity: )
A article about him and his interests and contributions to recreational mathematics.
Category: Science\Math\Recreations
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Gathering for Gardner (Popularity: )
Contains math, puzzle, geometry, illusions, mazes, links, articles and problems.
Category: Science\Math\Recreations
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Illusions
