Nuclear weapons

Weapons-grade plutonium can fuel nuclear reactors known as mixed oxide reactors, but none of these exist in the U.S.

After winning a Breakthrough Prize, the world’s most lucrative science award, theoretical physicist David Gross is using the moment to warn of nuclear war’s existential threat—and how we can escape it

President Trump keeps promising to secure Iran’s nuclear “dust,” which is actually a gas

Newt Gingrich raised eyebrows with a social media post about using nuclear bombs to cut a new channel in the Strait of Hormuz. There’s history there

From emergency oil reserves to nuclear scrutiny, bigger hail, and research on a connection between the aging gut and the brain

Although President Trump has claimed Iran was weeks away from developing a nuclear weapon, much more work was needed for the country to do so

The Trump administration’s war with Iran over its nuclear ambitions raises new questions about the country’s uranium stockpile

“The only countries that will really learn more if [U.S. nuclear] testing resumes are Russia and, to a much greater extent, China,” says Jeffrey Lewis, an expert on the geopolitics of nuclear weaponry

Russian leader Vladimir Putin claimed his nation conducted a successful flight of a nuclear-powered cruise missile. Here’s how that missile might work

The White House has now fully embraced bomb-prone nuclear fuel technology. This should stop before an arms race, atomic terrorism or even nuclear war results

Nuclear policy specialist David Albright explains how his organization is monitoring for damage to nuclear sites following U.S. and Israeli strikes

American military engineers designed the GBU-57/B bomb to devastate deeply buried bunkers without radioactive fallout. It’s the only nonnuclear weapon that can reach Iran’s hardest target