Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

A Princeton University simulation shows how a single low-yield nuclear weapon could rapidly spiral into a full-scale ...

Sébastien Philippe, a nuclear engineering professor and 2025 MacArthur Fellow, designed advanced computational simulations of ...

The Museum of Strategic Missile Forces tells the story of how Ukraine dismantled its nuclear weapons arsenal after ...

A subsurface atomic test near Yucca Flats, Nev., in March 1955. (U.S. Atomic Energy Commission via AP) In what would be a major shift in a decades-old American policy against global nuclear ...

The full-scope simulator for Phase I of the Lianjiang nuclear power plant in China's Guangdong province has passed factory acceptance testing and can now be delivered to the site for installation. The ...

Recent conflicts in Europe and the Middle East have reignited fears about the use of nuclear weapons. What would a nuclear conflict do to the planet’s environment today? In a new congressionally ...

President Donald Trump said Iran was "weeks away" from having a nuclear bomb. Iran was close to having bomb-grade uranium, but experts predicted it could have taken anywhere from months to two years ...

President Trump says Iran is "very close" to building a nuclear weapon. Just how close is Iran to developing a usable nuclear weapon? That question is at the heart of the Iran-Israel conflict -- and ...