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How Nuclear Bombs Work

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Nine countries hold the 13,000 nuclear weapons in the global stockpile. That's less than during the Cold War but it doesn't change the fact that these bombs are still a threat to global humanity. So how do they work and are we close to nuclear war?

How Nuclear Radiation Works

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Nuclear radiation can be extremely beneficial or extremely harmful -- it all depends on how it's used. Learn what nuclear radiation is all about.

How Nuclear Power Works

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On the one hand, nuclear power offers a clean energy alternative that decreases fossil fuel dependence. On the other, it summons images of quake-ruptured Japanese power plants leaking radioactive water. What happens in reactors in good times and bad?

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?

How a Nuclear Meltdown Works

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Nuclear meltdowns can be scary, but it's important to understand what causes them. Learn about how nuclear meltdowns work.

Can a car run on nuclear power?

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Is it possible to make a nuclear-powered car? Learn more about the first nuclear powered car and how we can use nuclear power plant technology.

How do scientists determine if a nuclear blast has occurred?

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In the first reports released since North Korea announced its underground nuclear test on Monday, officials are saying they have found no evidence of a nuclear signature in the air above the blast site.

How Japan's Nuclear Crisis Works

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Explosions, fires and dangerous radiation levels dominated the headlines after the March 11 earthquake and tsunami sparked a nuclear crisis in Japan. How did so many safety measures fail?

Alpha, Beta or Gamma? It's the Nuclear Radiation Quiz

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We live in a radioactive world, and we're not just talking about the times when a nuclear plant is melting down and scaring the heck out of us. How much do you know about the ABGs (or alphas, betas and gammas) of nuclear radiation?

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

science.howstuffworks.com/nuclear-test.htm

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.

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