Biggest threat is also the least likely at any moment....
Big object from space colliding with Earth.
2nd place: Far higher probability, but not extinction level....
Nuclear war.
Everything else is fully survivable, some
discomfort & death notwithstanding.
Big object from space colliding with Earth.
2nd place: Far higher probability, but not extinction level....
Nuclear war.
Everything else is fully survivable, some
discomfort & death notwithstanding.