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- Anyone who loves or collects rocks
Unique 1000-piece circular-shaped jigsaw puzzle offers an entirely different degree of difficulty
and life lessons from Emerson and his contemporaries--including Thoreau and Whitman--he offers practical lessons in the art of living
favorite parks
full of grace and heartache
New Book of Optical Illusions Tracy Letts - Anyone who loves orHow 33 ancient, familiar and new optical illusions work, with 150 examples. The New Book of Optical Illusions is a mind bending collection of 150 of the most significant optical phenomena, loosely grouped into 33 chapters according to particular visual effect. An optical illusion has two elements. One is the perceived illusion, what you see. It may be merging lines, moving shapes or conflicting sizes. The other element is the scientific explanation or
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US$ 147.88
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US$ 147.88
