What hides this stereogram?

Stereogram - 3D Image

#brainteasers #stereogram #3Dimage

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Knock Knock Collection 026

Knock Knock
Who's there?
Bitter Bianca!
Bitter Bianca who?
Bitter Bianca next train out of here, pardner!
Knock Knock
Who's there?
Bjorn!
Bjorn who?
Bjorn Free!
Knock Knock
Who's there?
Bo!
Bo who?
Bo Geste!
Knock Knock
Who's there?
Bolivia!
Boliva who?
Boliva me, I know what I'm talking about!
Knock Knock
Who's there?
Bologna!
Bologna who?
Bologna & cheese!

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X-10 nuclear reactor

In 1943, the X-10 nuclear reactor at the Oak Ridge National Laboratory went "critical" with a self-sustaining fission reaction - the world's second reactor to achieve one. The reactor took just nine urgent months to build. Over the next year, the reactor performed flawlessly, irradiating thousands of fuel slugs, which were disassembled and dissolved so the plutonium could be extracted, bit by precious bit. It was an experimental reactor far larger and more advanced than Fermi's Chicago pile: a graphite cube 24 feet on each side, with seven-foot-thick concrete walls for radiation shielding. By the end of 1944, the reactor's most urgent mission had been completed and its focus shifted to radioisotope production for medicine and research.[Image: X-10 control console]

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