The Doomsday Clock is still at 90 seconds to midnight. But what does that mean?

The Doomsday Clock is still at 90 seconds to midnight. But what does that mean? (phys.org)

The Doomsday Clock remains at 90 seconds to midnight
The Doomsday Clock is a visual metaphor for humanity's proximity to catastrophe
The clock is determined by a group of nuclear, climate, and technology experts
The clock was initially created in 1947 after the invention of the atomic bomb
The clock has been moved 25 times since its creation
The current setting of the clock reflects the risks of nuclear weapons, climate change, biological threats, and advances in artificial intelligence
The Doomsday Clock is a metaphor and symbol rather than a precise measurement
There are other methods, such as national risk assessments and global risk reports, to assess and prioritize threats