The clock was created by a group of experts, including Albert Einstein, in 1947.
Atomic scientists will meet later today to announce the new time on the Doomsday Clock -- a measure of how close they believe humanity is to being wiped out.
The clock was created in 1947 by a group of experts including Albert Einstein, who set the timer at seven minutes to midnight.
By last year it had ticked forward and now shows just 100 seconds remaining.