As it approaches Earth, a black hole would trigger earthquakes, volcanic eruptions and tsunamis.
During a nuclear war, hydrogen bombs destroy the world's greatest cities; a fallout of ash and debris creates a nuclear winter, plunging the planet into an ice age; crops fail and mass starvation drives humanity to the brink of extinction.
A solar storm turns Earth's electrical system into a smoking ruin, and modern civilization must cope without power.
After a volcanic hyper eruption blows through the surface of the Earth, molten rock slams into cities, shock waves bring down buildings, volcanic gas blocks out sunlight, food chains collapse, and a famine threatens the future of humankind.
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