The Doomsday Clock is a metaphor that represents how close humanity is to self-destruction, due to nuclear weapons and climate change.

• The clock hands are set by the Bulletin of the Atomic Scientists, a group formed by Manhattan Project scientists at the University of Chicago who helped build the atomic bomb but protested using it against people.
• The time of the clock is currently 90 seconds to midnight.
• The Doomsday Clock is a symbol that represents how close we are to destroying the world with dangerous technologies of our own making.
• It warns how many metaphorical “minutes to midnight” humanity has left. Set every year by the Bulletin of the Atomic Scientists, it is intended to warn the public and inspire action.
• When it was created in 1947, the placement of the Doomsday Clock was based on the threat posed by nuclear weapons, which Bulletin scientists considered to be the greatest danger to humanity. In 2007, the Bulletin began including catastrophic disruptions from climate change in its hand-setting deliberations.