HOW ONE SCIENTIST MAY HAVE SAVED THE WORLD FROM NUCLEAR WAR IN 1983

After the missiles hit, firestorms engulf cities around the world - shrouding the world in black clouds of soot, and blocking out the sun.

Food crops fail, temperatures plummet - and all those who survived the bombs would die a lingering death in the ruins.

SHOCKING REVELATION! 5 DOOMSDAY SCENARIOS WHICH COULD REALLY HAPPEN

Doomsday fans constantly predict that the end is only weeks or months away - and some are already buying supplies, just in case.

But are any of the scenarios which conspiracy theorists and doomsday preppers fear actually plausible?