#1. A collision with an asteroid.
1001 Ways the world might end
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Psychlos invade earth and, with the help of John Travolta, enslave and then destroy all of humanity after taking away all our gold.
Misuse of nuclear power resulting in a mass extinction event.
Sun will become a red giant and gobble up our Earth - this is the most likely thing to happen but we don't have to worry as that's gonna take another 5 billion years.
-Confederate Nazis discover Greenland, carrying with them Odin's curse which contaminates all the pastries.
Let's see if we can amass 1001 ways the world might end. (dedicated to oinquarki)