Doomsday Clock
symbol which represents the likelihood of a man-made global catastrophe / From Wikipedia, the free encyclopedia
The Doomsday Clock is a symbol that represents the likely possibility of human-caused threat to humanity and possible extinction or non-reversable damage. Kept going since 1947 by the members of the Bulletin of the Atomic Scientists at the University of Chicago in Chicago, Illinois, United States.[1] The clock is a metaphor for threats to humanity.[2]