The 'Doomsday Clock' is now 85 seconds to midnight — the closest it's ever been. What scientists say this means for humanity and how the time is determined.

The clock is a symbolic way to show the public how close scientists believe the world is to a human-made apocalypse.
Texarkana Gazette

EDITORIAL | Ticking ...: Nuclear scientists to reset Doomsday Clock this month

Since 1947 -- after the end of World War II and at the beginning of the Cold War -- the Science and Security Board of the Bulletin of Atomic Scientists have kept what they call a "Doomsday Clock." ...
AOL

The world's first nuclear clock can detect changes in nature’s fundamental constants

Scientists have taken another giant step towards building the most precise clock ever imagined—one that could display not only the passage of time, but shifting rules of nature itself. An ...
Yahoo

The world's first nuclear clock can detect changes in nature’s fundamental constants

Add Yahoo as a preferred source to see more of our stories on Google. The thorium crystal. The core element of the experiment: a crystal containing thorium atoms. (CREDIT: TU Wien) Scientists have ...