My money is on the world ending. But not until the heliosphere of the sun expands and incinerates the Earth as the sun enters the red giant phase, after most of the hydrogen has been converted to helium and the helium phase begins.
That gives us a few minutes.
My bet is on 3,661,912,000,000,000,427 minutes from..... NOW!
The other way is when the Earth-Moon pair both have their faces locked towards each other (as the moon has, already). But that is due to happen 29.8 minutes after the heliosphere expands, so I don't think that will be your problem.
Or then again, when the nuclear internal heating of the Earth subsides, the movement of the techtonic plates will cease. At that point, as volcanic activity subsides, there will be no more release of water and other materials. Eventually the solar wind will strip away the air and water and life may have a few problems. That will probably occur at about 3,661,911,999,871,312,662 minutes from..... NOW! So, after you ape creatures don your space suits or burrow under the ground for this one, the expanding heliosphere will knocking on your door not long afterwards.
Or there again, Fred (Grim Reaper Mk7) may simply zoom around on his fiendish unicycle, harvesting you all.
Who can tell?
But it is strange. Out of all the lifeforms that I own in the universe, only you Earthlings name your planet after the word for dried mud - Earth.
Daft? Not arf!
Poll
