5 August 2020
The nuclear bomb told us we are the greatest threat to our own survival – and the covid-19 pandemic shows the lessons still to learn, say Anders Sandberg and Thomas Moynihan
5 April 2018
A South Korean university has dismissed fears it would work on killer robots. The dispute reflects growing worries over autonomous weapons, says Paul Marks
15 March 2018
Hard-line regimes once tried to hide their attempts to poison defectors. Now they make them blatant. Tougher responses are required, says David Hambling
14 February 2018
Recent near misses show China's pursuit of space prowess seems to trump debris risks. The re-entry of its space station is another looming drama, says Paul Marks
6 November 2017
Outlandish threats in the standoff between North Korea and Donald Trump are bluffs whose main aim is to bolster support at home, says game theorist Petros Sekeris
2 August 2017
Kim Jong-un’s unusual celebrations following a missile test this year herald the nation’s confidence in its ability to threaten US cities, says Jeffrey Lewis
3 May 2017
Warnings that North Korea could detonate a nuclear bomb in orbit to knock out US electrical infrastructure are far-fetched, says arms expert Jeffrey Lewis
