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

Employees at Lawrence Livermore National Laboratory work on a high-performance computer. Purdue researchers have collaborated with the national laboratory, using a similar high-performance computer to ...

Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation’s adversaries to ...

Minutes before walking into a high-stakes meeting with Chinese President Xi Jinping this past week, President Donald Trump announced what could prove to be a stunning shift in American nuclear policy.

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 ...