The Doomsday Clock, which shows how symbolically close the world is to apocalypse, will remain at 90 seconds to midnight.
The clock is set annually by the Bulletin of the Atomic Scientists, who say that "ominous trends continue to point the world toward global catastrophe".
It said that the decision to sustain 90 seconds to midnight should not be taken as a sign that the international security situation has eased, rather that world leaders should take it as "stark warning".
The threat of a new nuclear arms race, the war in Ukraine, and the ongoing climate crisis were all factors.
In its statement released on Tuesday (local time), the Bulletin said that China, Russia and the US were spending to "expand or modernise their nuclear arsenals", adding to the "ever-present danger of nuclear war through mistake or miscalculation".
Russian threats of the use of nuclear weapons in Ukraine also created a risk of nuclear escalation, it added.
A lack of action on climate change and the risk of misuse of biological technologies and AI were also cited.
The Bulletin said that "these threats, singularly and as they interact, are of such a character and magnitude that no one nation or leader can bring them under control".
Cooperation between three of the world's leading powers - China, Russia and the United States - is needed to "pull the world back from the brink of catastrophe," it added.
The Doomsday Clock was created in 1947 by J Robert Oppenheimer and other US scientists who had invented the atomic bomb.
The hands of the clock have moved 25 times.
In 1947, they started at seven minutes to midnight. By 1991, the end of the Cold War, they had fallen back to 17 minutes to midnight.
SHARE ME