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

Ukraine

Volodymyr Zelenskyy paid a visit to the wounded defenders of Ukraine undergoing treatment at a military hospital. Credit: Україна. Accessed via Wikipedia. Public domain mark 1.0.

Here’s what Western leaders need to remember about Zelensky’s emotional appeals

By Roger Petersen | Nuclear Risk, Opinion

Sharon Squassoni

Rethinking the unthinkable: Ukraine reveals the need for nuclear disarmament

By Sharon Squassoni | Analysis, Nuclear Weapons

Mastermind or madman? Putin shows why the world needs new nuclear agreements

By Daniel Holz | Analysis, Nuclear Weapons

army soliders with a helicopter in the background

US Army plan to combat climate change lacks the fighting spirit

By Neta C. Crawford | Analysis, Climate Change

A loitering munition.

Russia may have used a killer robot in Ukraine. Now what?

By Zachary Kallenborn | Disruptive Technologies

Responding to a Russian demonstration of nuclear muscle-flexing

By Herbert Lin | Analysis, Nuclear Weapons

In striking Ukraine, Russia also hit nuclear arms control

By Petr Topychkanov | Nuclear Risk, Nuclear Weapons

The A1 Verse: Our world in stupor lies

By Thomas Gaulkin | Special Topics

Tacit rules to avoid a NATO-Russia war

By Steven Pifer | Nuclear Risk, Nuclear Weapons, Opinion

How to avoid nuclear catastrophe—and a costly new arms race

By Daryl G. Kimball | Analysis, Nuclear Weapons

Russian ambassador to the United Nations.

Russia amplifies bioweapons claims at the United Nations Security Council

By Matt Field | Biosecurity

Public health lab in Georgia.

Russian nuclear and biological disinformation undermines treaties on weapons of mass destruction

By Milton Leitenberg | Biosecurity, Chemical Weapons, Nuclear Weapons