The Doomsday Clock is a design that warns the public about how close we are to destroying our world with dangerous ...

The latest adjustment to the Doomsday Clock highlights rising nuclear hostilities among global powers, emphasising the urgent ...

1947: Seven minutes to midnight The clock first appears as a symbol of nuclear danger. 1949: Three minutes to midnight The Soviet Union explodes its first atomic bomb.

National security, climate change and nuclear danger are all factored into the decision of where the clock is placed. It currently stands at 90 seconds to midnight – the closest it has ever been.

Former Cuban dictator Fidel Castro made a bold public appearance Friday, warning thousands of students at the historic University of Havana of what he believes is the world's looming nuclear threat.