- The danger level was compounded by information warfare and disruptive technologies
- On the nuclear front, the arms control boundaries that helped prevent catastrophe over the last half century are being dismantled
- The decision on the clock is taken by panels of experts, including 13 Nobel laureates
The Doomsday Clock on Thursday ticked down to 100 seconds to midnight, symbolising the greatest level of peril to humanity since its creation in 1947 as the threat posed by climate change and a growing nuclear race loomed large.
The danger level was compounded by information warfare and disruptive technologies ranging from deepfake video and audio to the militarisation of space and the development of hypersonic weapons.
"We are now expressing how close the world is to catastrophe in seconds - not hours, or even minutes," said Rachel Bronson, president of the Bulletin of the Atomic Scientists, in announcing the change.
The decision on the clock is taken by panels of experts, including 13 Nobel laureates.
It was originally set at seven minutes to midnight, and the previous worst -- two minutes to midnight -- held from 2018 to 2019 as well as 1953. The furthest it has ever been is 17 minutes, following the end of the Cold War in 1991.
On the nuclear front, the arms control boundaries that helped prevent catastrophe over the last half century are being dismantled and may be gone by next year, said subject expert Sharon Squassoni.
This includes the demise in 2019 of the Intermediate-Range Nuclear Forces (INF) Treaty, with the US and Russia entering a new competition to deploy once banned weapons. The US has suggested it won't extend New START, an arms reduction treaty signed in 2010.
"This year could see not just the complete collapse of the Iran nuclear deal," added Squassoni, with Tehran boosting its enrichment efforts.
And despite initial hopes US President Donald Trump's unorthodox approach to North Korea may produce results, no real progress ensued, said Squassoni, with Pyongyang instead vowing to press ahead with a new strategic weapon.