How long has humanity got?
Experts from Bulletin of Atomic Scientists reveal the Doomsday Clock Source: AAP / Patrick Semansky
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The 'Doomsday Clock' has been set at 90 seconds to midnight, closer than ever before to the threat of annihilation.But what is the Doomsday Clock? Who decides where it is set? And what does '90 seconds to midnight' actually mean?
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