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one that might just turn National Treasure skeptics into begrudging admirers
A brand new design and a brand new puzzle
Dallas Brian Grimm
Compost your food scraps and grow your own food
The New Book of Optical Illusions Sharks! one that might just turnHow 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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