The Stockholm International Peace Research Institute report says it hasn't seen nuclear weapons playing such a prominent role in international relations since the Cold War.
Russian President Vladimir Putin issued explicit nuclear threats to the West, even as he assured Russians their country could both win the war in Ukraine and thrive economically.
As President Biden and Group of Seven leaders gathered in Hiroshima, people in Japan wanted the setting to act as a powerful symbol for consensus toward banning nuclear arms.
A giant laser facility in Livermore, Calif., says it has created net energy from nuclear fusion. It's an important breakthrough, but fusion power remains a distant dream.
North Korean leader Kim Jong Un said his country will never abandon the nuclear weapons it needs to counter the United States, which he accused of pushing to weaken the North's defenses.
Russian President Vladimir Putin gave orders to his nation's nuclear forces over the weekend, but their exact meaning is unclear. Russia has more nuclear weapons than any other nation.
As North Korea's dictator marks a milestone on Friday, he might be facing his toughest moment yet, as crushing sanctions, the pandemic and growing economic trouble converge
Citing President Biden's speech to Congress, North Korea says the United States will face a grave situation if it continues to pursue its "hostile policy" toward the country's nuclear program.
Kim's comments come just days ahead of President-elect Joe Biden's inauguration. Biden has promised "principled diplomacy" with North Korea, implying a break with Trump's high-stakes summits.