The authoritative guide to ensuring science and technology make life on Earth better, not worse.

nuclear weapons

United Kingdom nuclear weapons, 2024

By Hans M. Kristensen, Matt Korda, Eliana Johns, Mackenzie Knight | Nuclear Notebook, Nuclear Weapons

implosion at National Ignition Facility lab test

The entanglement of fusion energy research and bombs

By Arjun Makhijani | Nuclear Energy, Nuclear Risk, Nuclear Weapons

“NATO or Nukes”: Why Ukraine’s nuclear revival refuses to die

By Mariana Budjeryn | Nuclear Weapons

Why Russia is more likely to go nuclear in Ukraine if it’s winning

By Mariana Budjeryn | Nuclear Weapons, Opinion

Question for the candidates: Will the United States sign and ratify the Treaty on the Prohibition of Nuclear Weapons?

By Alicia Sanders-Zakre | Nuclear Weapons

The experts comment: Key nuclear questions that the US presidential candidates should answer

By François Diaz-Maurin, John Mecklin | Nuclear Weapons

President Vladimir Putin talks with the governor of Kursk on the situation regarding the Ukrainian invasion of the south of the oblast. Kremlin.ru, CC BY 4.0, via Wikimedia Commons.

The new red line: Why a prolonged conflict in Ukraine makes a nuclear attack more likely

By Phillips P. O’Brien | Analysis, Nuclear Risk

AI and the A-bomb: What the analogy captures and misses

By Kevin Klyman, Raphael Piliero | Artificial Intelligence, Disruptive Technologies

atomic bomb test in Marshall Islands

Project 2025’s stance on nuclear testing: A dangerous step back

By Tom Armbruster | Nuclear Weapons, Opinion

Indian nuclear weapons, 2024

By Hans M. Kristensen, Matt Korda, Eliana Johns, Mackenzie Knight | Nuclear Notebook, Nuclear Weapons

Searching for nuclear bombs at the Democratic convention

By Thomas Gaulkin | Nuclear Risk, Nuclear Weapons

illustration of hands playing What-A-Mole with global threats.

Global threats don’t happen in silos. They shouldn’t be managed separately, either.

By Rumtin Sepasspour, Courtney Tee | Disruptive Technologies