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How the Zumwalt Class Destroyer Works

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The Zumwalt is the military's class of next-generation destroyers. Find out how the Zumwalt class destroyer works and learn about Zumwalt technology.

How Does the U.S. Government Declassify Top Secret Documents?

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The FBI's seizure of top secret files from Donald Trump's home shined a spotlight on the declassification system. How does the process work?

Tsar Bomba: The Most Powerful Nuclear Weapon Ever Built

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In 1961, the Soviet Union detonated the Tsar Bomba, still the biggest, most powerful nuclear bomb ever built. One of the cameramen who recorded the event said it sounded "as if the Earth has been killed."

Paul Berg

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Berg, Paul (1926-), an American biochemist and molecular biologist, has been at the forefront of genetic engineering, both as an inventor of a pioneering procedure and as an advocate concerned about the risks of genetic research.

How a Nuclear Reactor Works

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Over the years, nuclear reactors have been viewed as both a miracle and a menace. How does a nuclear reactor do its job? And what happens when something goes wrong?

Is it possible to run a nuclear test without producing radioactive fallout?

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In what may prove to be the first nuclear explosion since 1998, North Korea claims it has conducted an underground test of a nuclear weapon.

How Lie Detectors Work

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Lie detection is a consistently controversial topic -- how can a machine tell truth from deception? Does everyone have the same physiological reaction when telling a lie? If so, how can some people "beat the box"? Find out what these devices measure and if they really can detect lies.

10 Unidentified Sounds That Scientists Are Seriously Looking Into

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"Stop, what's that sound?" Doesn't it creep you out when you don't know? There are lots of sounds out there that baffle even scientists.

How Army Reconnaissance Jobs Work

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Army reconnaissance jobs are highly sought-after. Visit HowStuffWorks to learn all about Army reconnaissance jobs.

10 Science Questions You Should Really Know How to Answer

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Why is the sky blue? What's relativity all about? If you're thinking, "something to do with light and physics and stuff," we have some short explanations for you.

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