The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history. Here's a look at how — and why — it's moved.

1947: The clock was created and set at seven minutes to midnight. 1953: After hydrogen bomb tests by the U.S. and the Soviet Union, it moved to two minutes to midnight.

Earth is moving closer to destruction, a science-oriented advocacy group said Tuesday as it advanced its famous “Doomsday Clock” to 89 seconds till midnight, the closest it has ever been.

The Doomsday Clock of the Bulletin of the Atomic Scientists, set at 89 seconds to midnight, is displayed during a news conference at the United States Institute of Peace, Tuesday, Jan. 28, 2025 ...

The Doomsday Clock, pictured here next to scientist Bill Nye, is a symbol reflecting global instability and nuclear threat. Jacquelyn Martin/AP By Brenda Ruiz Dan Tucker Jan 25, 2024, 11:37am PDT ...

The scientists put the clock the closest it's been to “midnight” on Tuesday, leaving just 90 seconds left on the clock, according to a report from CNBC.