who invented the doomsday clock

The Doomsday Clock was created in 1947 by artist Martyl Langsdorf for the cover of the Bulletin of the Atomic Scientists’ magazine.

She designed the now-famous clock image—showing a clock close to midnight—after being asked by Bulletin co‑founder Hyman Goldsmith to create a striking cover that symbolized the new nuclear dangers facing humanity. The broader concept and ongoing use of the Doomsday Clock were developed and maintained by the Bulletin of the Atomic Scientists, an organization founded by Manhattan Project scientists concerned about nuclear weapons and other existential threats.