The Doomsday Clock has been used to examine the world’s vulnerability to global catastrophe for nearly a century.

The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history.

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Due to "deeply concerning" world trends, the Bulletin of the Atomic Scientists' said its "Doomsday Clock" is now 89 seconds ...

The Doomsday Clock now stands at 89 seconds to midnight reflecting unprecedented global risks including nuclear proliferation ...

The Bulletin of the Atomic Scientists set the clock to 89 seconds before midnight - which is supposed to represent how close the total destruction of the world is to us.

Iconic Doomsday Clock moves one second closer to midnight as global existential threats rage. Clock factors include nuclear ...

On Tuesday morning, the Doomsday Clock was set at 89 seconds to midnight, which is the closest it has ever been to midnight ...

For the first time in three years, the Bulletin of the Atomic Scientists moved the Doomsday Clock forward by one second.

UNDATED (CNN/CNN Newsource/WKRC) - The Doomsday Clock has moved closer to midnight than ever before.