the world will spin of its axis and end up in a whole new galaxy and the people that were lucky enough to survive it will call their new galaxy Snickers or 3 Musketeers:dance2: ( in actuality the world will probably end the same way it started):huh:
Eventually the earth will be swollowed up by the sun as it grows into a red giant (scientificly proven to be what will happen to the planet) as far as mans existance on this planet, eventually there will be another world war (look at history it's bound to happenagain) and people will be dumb enough to kill eachother off because people don't know how to compromise and live with each others differences (like religon, and ethnic background).
Or
Everyone in the world will become addicted to mexican food, and all the methane produced by people eating to many refried beans will cause large pockets of gas to float around the planet and when one passes by a volcano it will ignite blowing us all up had to give the happier version
like captian caveman said, the earth will be swallowed up once the sun grows to red giant size, but man will most likely go extinct or leave or evolve into something new long before then. it is unlikely a meteor will physically destroy the earth, but it may wipe out most of the life on earth.
The creator will go on vacation and forget to do a 50% water change which will kill off half of the food chain, causing the rest of the the organisms on earth to wither away. When he returns he will say oops then remember how overstocked he was and try again with smaller organisms that can live peacefully within the confines of this planet.
the sun will run out of fuel and burn out, and then we wont have enough light (or will we.. this IS millions of years from now) for plants and when they die off, the food chain colapses