Harold camping, a dumb mofo, days it will end on may 21. He said the same 17 years ago, but he was wrong.
2012 was thought by the myans, Egyptians, Norse, etc. To be the end of the world due to a "desctruion" being.
Scientist think the world may end in 3 trillion years because of the sun exploding.
Population studiers think the world may end by overpopulation, but we would either have a bunch of us starve to death, and the remaining get more food, or we would eat each other.
And finally, the Nuclear war scenario.
Others thInk we will kill our species in WWIII, using chemical weapons.