A nuclear treaty first signed in 2010 is expiring this week. If it's not replaced, experts say a global arms race could be in ...

Russia said Wednesday it was "no longer bound" by limits on the number of nuclear warheads it could deploy, as its last arms ...

Russia vowed Wednesday to act "responsibly" hours before its last nuclear treaty with the United States was set to expire, as ...

Russia vowed Wednesday to act "responsibly" should its last nuclear treaty with the United States expire on February 5, amid ...

A Russian official said Moscow is ready to respond with military measures if the United States deploys its missile defense program to Greenland.

The former U.S. president has warned that the expiration of the New START treaty would "wipe out decades of diplomacy." ...

That is the closest it has ever been in the history of this symbolic portrayal of the state of the world. Since 1947, the Doomsday Clock has metaphorically represented the risk that we will succumb to ...

Climate experts highlighted rising nuclear noncooperation and climate change as contributing to the likelihood of human-caused catastrophe at a Georgetown University event Jan. 27.

The Milan Cortina Winter Olympics begin in one week, and the United Nations and organizers are calling for a 7-week pause of all wars worldwide — as they do every time the Olympics take place.

Kirsty Coventry, the multi-Olympic swimming champion who last year became the first woman to lead the International Olympic Committee, addressed the General Assembly at the latest vote in November.

If you feel like we are inching nearer to the end of the world, you are not alone. The Bulletin of the Atomic Scientists on ...

Scientists gathered and moved the “Doomsday Clock” to 85 seconds on Tuesday, the closest it has ever been to midnight.