The Doomsday Clock has been set to two minutes from midnight. It's the most dire setting since 1953, when the U.S. and Soviet Union were pushing each other in a nuclear arms race.
The Bulletin of the Atomic Scientists created the clock in 1947 as a visual representation of the possible threats facing the Earth and humankind. The closer the minute hand is to midnight, the closer the group perceives the human race is to the apocalypse.
Although the clock's minute hand didn't move since 2018, the Bulletin warns the Earth has reached a "new abnormal" in which threats such as nuclear weapons and climate change have left the world in a state of peril.
In a statement, the Bulletin said that, "though unchanged from 2018, this setting should be taken not as a sign of stability but as a stark warning to leaders and citizens around the world."