which apocalyptic senario do you fear the worst?

[Zouji]

LOL. I feel really really bad for the closest stranger to Thudz when the world ends.

"Oh god I'm so glad I found someone else alive."

"Yes, yes, so am I. Won't you come in? Dinner just arrived and I'm sure you're as edible, I mean, starving as we are."

Well as long as you don't eat their brain then you shouldn't contract any horrible diseases so long as they are properly prepared and cooked thoroughly. So don't eat brains, bone marrow, spinal fluid, or any small intestines and hopefully you won't catch a horrible brain disease.
http://scienceline.org/2008/01/21/ask-stern-cannibal/



My biggest fear would be a sudden drastic shift in the tectonic plates. Possible brought about by the reduction in overall mass of the polar ice caps. That would completely change most of the land all over the world. As far as I have learned the earth crust floats on a layer of magma so a reduction in weight drastically in one or two areas might cause drastic changes in the position of tectonic plates.

I'm not a geologist though so I have no clue if this could happen. I know that some have said that they can shift fairly rapidly and have done so in the past. How long said shift took is a matter of some debate. Even if it took 1000-10,000 years for a rapid plate shift there might be a lot of spurts of sudden movement which would cause massive earthquakes and volcanic eruptions. But again no one really knows since Geology and plate movements are not fully understood. Here is a nice article though on plate tectonics.
http://eands.caltech.edu/articles/LXVI/tectonics.html

Another big disaster could occur if the polarity of the earth changes. Meaning on a compass north would point to the South Pole. On a compass south would point to the North Pole. This is supposedly supposed to happen in 2012. I have been doing some reading and the North Pole position has been wandering around.
http://news.nationalgeographic.com/news/..._pole.html

This does not mean that the poles will reverse. Scientists have no clue as to when that will happen next.
http://www.space.com/scienceastronomy/ea...40407.html
No one knows how electronics, satellites, telecommunication, and even bird migration might be affected if that happens. But, scientists say that if it does reverse it will probably take 5000-10,000 years for the poles to completely flip polarities depending on if you are measuring polarity at the equator or at one of the poles.

Another big disaster that could happen soon has already been mentioned and that is the super volcano at yellow stone park. When it erupts it could cover all of North America with up to 3 feet of ash.
http://www.livescience.com/environment/0...lcano.html


But in any disaster listed even if it is a Zombie uprising, I believe humanity will survive. Hell as far as I know zombies can't tunnel underground. All you need would be to have a geothermal, nuclear, (fusion or fission), or other form of making energy and then you would be fine. You could make green house lights for growing plants. Or you could even cultivate various forms of fungi to live on since most of them need no light to grow.