The Doomsday Clock remains set at two minutes until midnight.
Each year a group of scientists and scholars known as the Bulletin of the Atomic Scientists updates the clock which symbolizes human existence and life on earth with midnight representing global annihilation.
They gave their annual presentation Thursday, leaving the clock at 11:58 p.m.
That represents no change since last year, but remains the closest the clock has ever come to apocalyptic midnight.
The group in charge of the clock says nuclear weapons and climate change are the reasons the minute hand is so close to midnight.
They say the withdrawl of the United States from the Iran Nuclear Deal is one reason for concern.
Another is the fact that global carbon dioxide emissions resumed an upward climb in 2017 and 2018.