Ciencia, astronomía, ciencias de la Tierra
No.0428 Virgo Virgo
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No.0427 Leo Leo
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No.0426 Cáncer de cáncer
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No.0425 Géminis Géminis
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No.0424 Taurus Taurus
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No.0423 Aries Aries
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No.0413 Necker Cube 2
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No.0412 Cubo Necker
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No.0411 Pentágono de Penrose
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No.0410 Penrose Square
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No.0409 Triángulo Penrose
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No.0361 Michizane Sugawara
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Cadena No.0329
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No.0328 Gear (COG)
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No.0315 Libro abierto
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