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

Russia

US President Bill Clinton, Russian President Boris, Yeltsin, and Ukrainian President Leonid Kravchuk sign the Trilateral Agreement on transferring nuclear weapons from Ukraine to Russia and associated matters in Moscow, January 1994. Photo credit: Joseph P. Harahan, historian of the Defense Threat Reduction Agency, and the Clinton Presidential Library.

Why the Ukraine war does not mean more countries should seek nuclear weapons

By Jeffrey W. Knopf | Nuclear Weapons

The A1 Verse: After a missile—

By Thomas Gaulkin | Special Topics

If Ukraine chooses neutrality, what could that look like?

By Mariana Budjeryn | Nuclear Risk, Opinion

P5 Press Conference at the United Nations. April 2013. Credit: U.S. Mission Geneva / Eric Bridiers. Accessed via Flickr. https://www.flickr.com/photos/us-mission/8663813428 CC BY-ND 2.0.

Nuclear arms control: Still necessary, but more difficult than ever

By Stephen J. Cimbala, Lawrence J. Korb | Analysis, Opinion

Visualizing the news from Ukraine

By Thomas Gaulkin | Multimedia

Internal Troops of the Ministry for Internal Affairs (Russia). Credit: Vitaly V. Kuzmin. Accessed via Wikimedia Commons. CC BY-SA 4.0.

Russian forces leave Chernobyl; UN watchdog offers Ukraine more help

By Susan D’Agostino | Nuclear Energy, Nuclear Risk

A biological weapons threat to Ukraine is a biological weapons threat to the world

By Asha M. George | Biosecurity

The science says that children experience better mental health outcomes when their caregivers talk with them about difficult subjects, including war and nuclear threats. Credit: Ben Wicks. Unsplash license. https://unsplash.com/photos/iDCtsz-INHI

How to talk to your kids about the war in Ukraine

By Susan D’Agostino | Analysis, Nuclear Risk, Nuclear Weapons

Why—and how—the world should condemn Putin for waving the nuclear saber

By Pavel Podvig | Nuclear Risk, Nuclear Weapons

Stepnogorsk biologial weapons plant.

Amid false Russian allegations of US “biolabs” in Ukraine, it’s worth asking: What is a bioweapon?

By Matt Field | Disruptive Technologies

Wildfires break out in Chernobyl amid a non-functioning radiation-monitoring system

By Susan D’Agostino | Nuclear Energy, Nuclear Risk

The Russian attack on the Zaporizhzhia nuclear power plant

Could an attack on Ukrainian nuclear facilities cause a disaster greater than Chernobyl? Possibly, simulations show.

By Jungmin Kang, Eva Lisowski | Nuclear Energy, Nuclear Risk