My money is on a meteor to be honest.
What about you?
The gif shown here is a 100% scientific representation of a meteor event. View at your own risk.
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Edited by Sheep 彰子: 3/27/2016 2:26:03 AMHumanity (and probably most life on Earth) will end with either a nuclear war, or we pollute the Earth to an uninhabitable state. Or, an uncontrollable virus [i]finally[/i] wipes us out. The planet Earth will be destroyed when the Sun expands to a red giant and melts the Earth.