The two-minute warning that had held over the past two years has now shrunk to 100 seconds before midnight on the Doomsday Clock set by the Bulletin of the Atomic Scientists.

The Doomsday Clock has been ticking for 76 years. But it’s no ordinary clock. It attempts to gauge how close humanity is to destroying the world.

MLB's new norm features a pitch clock. In the first weekend of Spring Training pace was up and total ... More game time was nearly 30 minutes less than Spring Training in 2022. (Photo by Steph ...

The crucial point is using two different time scales—similar to how a clock has a second hand and a minute hand. The paper is published in the journal Nature Physics.

The Bulletin of the Atomic Scientists has moved its Doomsday Clock forward for 2025, announcing that it is now set to 89 seconds to midnight.

After the two-minute warning, certain clock running rules also take effect. Why does the NFL stop games and use different rules when there are just a couple of minutes left in the half?