Was it simply a matter fo trying for a bridge too far? Or a case of who should go first in making a conciliatory gesture?

From Harvard University's Belfer Center, this study of artificial intelligence and its likely security implications is an outstanding one-stop primer on the subject.

We call upon the leaders of the United States and Russia to immediately extend New START by five years so as to ensure the continuation of the limits on their nuclear arsenals, as well as the rigorous and effective inspection and verification regime put in place by the treaty.

“Refugia provide a safe haven during periods of an unfavorable climate,” Toni Lyn Morelli and co-authors wrote in the journal PLOS One in 2016. Indeed, such areas — whether they be on mountain slopes, in shady forests, or in deep, cool canyons — are characterized as being naturally buffered from local and regional climate changes. As global temperatures rise, these pockets could help to ensure the continued existence of valued species. In identifying refugia, Morelli and her collaborators — part of a cadre of conservation scientists working on this issue — hope their efforts will contribute to improvements in land management.

The word-war between Washington and Pyongyang advanced from grandiose insults to concrete threats on Monday, seeming to march eerily in line with warnings that rhetoric-mongering among US and North Korean leaders could, over time, lead to war.

El tratado de prohibición de las armas nucleares que se propone parecería tener muchas cosas en común con el control de las armas nucleares. Después de todo, ambos enfoques reconocen que las armas nucleares son peligrosas y procuran reducir el número de armas nucleares en el mundo. Sin embargo, la verdad es que el control … Continued

Laughter? In this climate? You must be joking.

How sea-level rise will reshape the population is dramatic. And it's only one part of the many effects of climate change that were examined in a 1,656-page report issued on the day after Thanksgiving by 13 federal agencies and 300 leading climate scientists—and about which the president said "I don't believe it."

This assessment of Russian President Vadimir Putin was written by Fiona Hill, at the time a senior fellow and director of the Center for the United States and Europe at The Brookings Institution; it was originally published in April 2016. Approximately a year later, Hill joined the Trump administration as the deputy assistant to the … Continued

A report that reflects discussion at the symposium, “The Fierce Urgency of Nuclear Zero: Changing the Discourse,” held in Santa Barbara, California, on October 24-25, 2016. The symposium was sponsored and organized by the Nuclear Age Peace Foundation. 

Some of the options are excellent, some are promising, and one is a little worrisome.

“Don’t bring a speech, bring a plan!” For months now, that’s what UN Secretary General Guterres has been telling heads of state and government.

John Morales writes about his experience fighting misinformation as a meteorologist.

Recently, bipartisan climate action groups in both the Senate and the House have attracted several unexpected members—including Lindsey Graham. But how do you separate the genuine conservative climate plans from smokescreens that are aimed at waylaying real solutions?

Yes, North Korea can probably deliver a functioning nuclear warhead to the continental United States. But the real issue is whether loose talk and a refusal to negotiate will lead to a "devastating crisis because of miscalculation [or] misperception."