Well, this is my very first post here.  I started this blog to see if anyone else thought about this stuff. .  I am 57 yrs old and yes that is but a blink of an eye when you consider how long the world has been around.  But in my time I do feel the summers have gotten hotter and the winters don't seem to be all that bad.  All of this would make one think that the world will continue to heat up until everything just withered and died.  I don't think so.  I believe that it will get hotter but only until a point. At that point something will happen, a large volcano eruption, multiple eruptions, an asteroid, or even world war III ending with nuclear war.  Any of these things will plunge the world into the next ice age.  I don't think it will start slowly, it will begin with a vengeance and snow and ice will cover everything.  Anyone left will starve or freeze to death unless precautions have been taken.  The glaciers will once again advance across the land.  I believe this sort of thing has happened multiple times, who knows how many times or how many civilizations have come and gone.  The governments are aware of this possibility and they have made arrangements to save the "ELITE".  Have they actually contemplated the duration they will have to survive.  Will something like this happen in my lifetime, I do not believe so but it is going to happen soon, the Earth can not take much more and the population will only increase.  I believe other civilizations saw the writing on the wall, they were possibly much more advanced than we are now and they were unable to do anything about it.  Somehow, some peoples or groups of peoples were able to survive to repopulate the species but over time the past and history was lost.  So in effect it was like starting from scratch.  Well enough for now. thank you