What is hidden in 3D image?

Stereogram - 3D Image

#brainteasers #stereogram #3Dimage

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New Submarine Ensign

The new Ensign was assigned to subs, where he'd dreamed of working since a young boy.
He was trying to impress the Master Chief with his expertise learned in Submarine School.
The Master Chief cut him off quickly and said, "Listen, 'sir', it's real simple. Add the number of times we dive to the number of times we surface. Divide that number by two. If the result doesn't come out even, don't open the hatch."

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Alois Senefelder

Born 6 Nov 1771; died 26 Feb 1834 at age 62.Johann Nepomuk Franz Alois Senefelder was a German inventor who developed lithography. To publish his own work, he needed a less expensive and more efficient printing alternative to relief printed hand set type or etched plates. His invention was the biggest revolution in the printing industry since Johannes Gutenberg's movable type. Today photo lithography is used to print magazines and books, but the original process of drawing by hand on litho stones still exists in the fine art world. The traditional surface for lithography is Bavarian limestone, regrained by hand for each use. The principle is simple: oil based printing ink and water repel each other. The image is drawn with greasy crayon and chemically treated. The image areas of the stone accept ink and undrawn areas will reject it.

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