Watch how the first atomic bomb test unfolded, as scientists pushed the limits of physics in a race to end the war. Behind the scenes, there were real fears that the explosion could trigger a chain reaction in the atmosphere and spiral out of control.

By Gram Slattery, Jonathan Landay and Erin Banco WASHINGTON, May 4 (Reuters) - U.S. intelligence assessments indicate that the time Iran would need to build a nuclear weapon has not changed since last summer,

Tyres stick to hot asphalt as I drive the Stuart Highway from Alice Springs northward, leaving the MacDonnell Ranges behind. My destination is the Warramunga facility, about 500 kilometres north – a remote monitoring station I’ve directed for the ...

Whether it’s an act of war or terrorism, all that really matters in the moments after the blast is that there are ways to save yourself and your loved ones. Here’s what you can do to survive a nuclear attack. The worst thing about a nuclear attack is ...

Sunday, April 26, marks the 40th anniversary of the world’s worst nuclear power plant accident at the Chernobyl nuclear power station in the Soviet Union.

Imagine a 150-kiloton nuclear bomb exploded in the city closest to you. Do you know how the city, its surrounding region, and its inhabitants would be affected? If you can't think of much more than "a lot of people would die," you're not alone. "We live in ...

Earlier this month, the New START treaty, a strategic-arms reduction agreement between Russia and the United States to limit their nuclear arsenal, expired. That accord was the last in a series of such agreements that have been extended or renegotiated ...

The Department of Energy’s National Nuclear Security Administration will face questions from the public about plans to make nuclear bomb cores at the Savannah River Site.