Russian nuclear chief warns of threats to country's existence, emphasizes need to strengthen nuclear shield as U.S.-Russia ...

By The Associated Press Russia accused Ukraine on Sunday of launching drone attacks that sparked a fire at a nuclear power ...

The United States, Soviet Union, Britain, France and China all scrambled to develop ever more powerful nuclear weapons ...

Kyiv has said its strikes are in response to Russia's attacks on Ukraine and are aimed at destroying infrastructure deemed ...

Iran's supreme leader said the current situation with the United States was "unsolvable", and that Tehran would never bow to ...

"They want Iran to be obedient to America. The Iranian nation will stand with all of its power against those who have such ...

The reactors have more than 110 times the energy density of existing diesel systems, according to Radiant, and can be ...

Alongside a massive build-up in conventional military firepower, China has embarked on a rapid and sustained increase in the ...

Iran plans to hold a call with France, Germany, and the UK as they threaten to reimpose UN sanctions over its nuclear program ...

The clash over Iran's nuclear program is escalating, with U.S. sanctions and Europe's snapback threat putting Tehran under ...

Interstellar object 3I/ATLAS shows an unexpected frontal glow that Harvard's Avi Loeb says cannot be explained by sunlight ...

One physicist says his design to use nuclear waste as fuel for nuclear fusion could help the U.S. be a leader in the fusion ...