I don't think the world will end in 2012 (but further in time/existance). However, i think our only problem today is the enslavement of the ppl. Watch the movie zeitgeist at their own website for free;
http://www.zeitgeistmovie.com/Drop all this with religion. It's all ancient astronomic observations and they all religions originate from the same one. Watch zeitgeist and you will understand.
Time for me to preach about the basic plattform of ourselves. (to understand the bigger picture)
What are we? - Lifeforms.
Where are we from? - Lifeforms evolve in the correct circumstances. Life needs first of all an atmospehere. Second is heat. Chemical substances (like water) react with heat. The reaction can create life. It's a slow process. If you look at diffrent animals apart from us humans on planet earth, then you will see alot of resemblence to each other. We clearly evolved from the same source (sort of speak).
Are there other lifeforms besides on planet earth? - Yes, there is. The universe is full of life. For instance, did you know that NASA found and destroyed ancient structures (bases created by some very intelligent creatures) on the moon. Here's a video that Neil Armstrong is said to have filmed in 1969;
http://www.youtube.com/watch?v=MWkGTJEK0Mc The creatures that built this abonded moonbase are far more ahead in the technology than us. However, it's said that NASA has two space programs. One for the public and one that is top secret. It's said that NASA has a base on the moon for instance and that they have traveled furthur than any human is said to have traveled from our planet. Former NASA employees have claimed that NASA have reported over 70 diffrent creatures from diffrent planets/galaxies/solar systems. For the public, NASA is said to airbrush buildings on photos from the moon before releasing them.
Something that's also pretty cool is that more recent photos from planet Mars, show possible plants/trees and water gatherings like lakes and so on. Lakes with vegitation around it. It's also speculations of structures on Mars. It's said that they have found pyramid-like mountains or structures. If they are just natural mountains or built structures I don't know. But, since the universe is full of life, it's very possible that they are built by either creatures from the planet or creatures that traveled there. Here's a link to info and photos from Mars with interesting stuff;
http://www.marsanomalyresearch.com/Let's stay on TOPIC now.
Is there a possibility for our planet to get struck by a giant comet? - Most defenetly. There are alot of debree that is flying around in space. I don't know how big the chances are of earth being struck though.
World leaders are preparing seedbanks on svaalbard. Do they know something that the public don't know? -They probably do. Once again I recommend you to watch the movie zeitgeist, if you trust your athority. They are pretty corrupted.
Remember that the universe is not adabted to us humans, but it's us that is adabted to the universe.
/ Donny