Some say the world will end in fire,
Some say in ice.
From what I've tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice
Is also great
And would suffice. - Robert Frost


I have no idea how the world will end. If the end of the world is the end of humanity, there's probably a couple trillion trillion trillion trillion ways that can happen, if it's the destruction of the actual planet, divide that by two.