60 Ilusiones ópticas y fenómenos visuales

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These pages demonstrate visual phenomena, called »optical illusions« or »visual illusions«. The latter is more appropriate, because most effects have their basis in the visual pathway, not in the optics of the eye.






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Phallic Logo Awards

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“The game designers across the nation are playing is; can they design a logo and get it approved without the client realising it’s a big spurting penis?

We asked our readers to send in the best cock logos from around the world for our team of experts to evaluate. Now we present to you the very cream of the cocks.”

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29 formas de atarse los zapatos

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“How many possible ways are there to lace an average shoe? This simple question, when answered with mathematics, results in some surprisingly big numbers - on an average shoe with six pairs of eyelets, there are 1,961,990,553,600 ways to feed a shoelace though those 12 eyelets.

In this section, I’ll present a (somewhat more realistic) few methods that I consider worthy of devoting the time required to create instructions, either because they have a particular benefit or just because I like the way they look.”


Sawtooth Lacing diagram
Ladder Lacing diagramZipper Lacing diagramKnotted Lacing diagramLock Lacing diagram

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Pumpkin Case Mod

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A treat for the computer geeks with a pumpkin case mod.

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Alcantarillas Japonesas

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Galería de alcantarillas Japonesas decoradas


» Galería de alcantarillas decoradas
» Manholes of the World, Unite! (projecto ruso)

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Origami$ - The Shirt

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As with all these designs, try to start with a relatively clean, crisp bill.

It will make it much easier. All folds should be sharply creased.

It helps to go over the fold with a fingernail on a flat, hard surface.

» The Shirt

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