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

United States

How impossible is the risk of nuclear escalation in Ukraine?

By Janice Stein | Nuclear Weapons

A table for five: What to expect from each player at Ukraine peace talks

By Rose Gottemoeller | Nuclear Risk

A growing nuclear debate: The risk of calling everything a nuclear threat

By Chloe Shrager | Nuclear Weapons

Biden allowing Ukraine to strike into Russia is much ado for little consequence

By Mariana Budjeryn | Nuclear Weapons, Opinion

North Korea sent troops to Russia. The reason(s) are “left to be seen”

By François Diaz-Maurin | Nuclear Weapons

A wargame suggests how a war between Israel and Iran might go nuclear

By Henry Sokolski | Nuclear Weapons

Question for the candidates: How will you reassure allies worried about the credibility of the US security guarantees?

By Sara Bjerg Moller | Nuclear Weapons

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

Question for the candidates: What is your plan to prevent the next dangerous and expensive nuclear arms race?

By Laura Grego | Nuclear Weapons

Question for the candidates: How will you deter North Korea’s aggression without deteriorating the situation on the Korean Peninsula?

By Eliana Johns | Nuclear Weapons

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

By François Diaz-Maurin, John Mecklin | Nuclear Weapons

Question for the candidates: Has Russia’s war in Ukraine changed your view of the role of nuclear weapons?

By Siegfried S. Hecker | Nuclear Weapons