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These are the finest closed, non-orientable, boundary-free manifolds sold ... These elegant bottles make splendid gifts, outstanding classroom displays, and ...
http://www.kleinbottle.com/
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This site contains galleries of photographs and articles about original origami designs by Robert J. Lang. Origami is the modern reincarnation of ...
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The best information on the Golden Section, Divine Proportion, Fibonacci series and phi. Explore its application to art, design, life, beauty, mathematics, geometry, ...
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An expanding collection of freely available, interactive Demonstrations in math, science, and many other areas--at all levels from elementary education to front-line ...
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Offers gadgets and gizmos, gift ideas, and games.
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Comprehensive online encyclopedias of astronomy, math, physics, scientific biographies, and scientific books, with many equations and formulas.
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At Turn Your Head we create unique scultpures made from the profiles of you or your loved ones, Great Gifts!
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Offers puzzles, gadgets, and other executive gifts.
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It is not hard to cut a bagel into two equal halves which are linked like two ... To start, you must visualize four key points. Center the bagel at the ...
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View the Skytopian gallery, hear intricate music at the SoundBurst Shrine, relive hidden treasures in classic gaming, learn amusing trivia about science and see every ...
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Creators of the Mathematica series of software titles.
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