Humanity has faced numerous close calls with extinction throughout history, from natural catastrophes to human-made disasters. This ranking explores the most significant doomsday scenarios that have threatened our species' survival. Featured events include the devastating Toba supervolcanic eruption that nearly wiped out early humans, the terrifying Cuban Missile Crisis that brought nuclear powers to the brink, the Chernobyl disaster that showcased atomic energy's dangers, and Stanislav Petrov's crucial decision that prevented nuclear war. Also examined are ice age glaciations, the Black Death's plague doctors, failed apocalyptic predictions like Harold Camping's end-times prophecy and the 2012 phenomenon, plus other extinction-level threats. Each represents a moment when humanity's continued existence hung precariously in the balance.
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