In Norse mythology, Fimbulwinter (Old Norse Fimbulvetr) is the immediate prelude to the end of the world, Ragnarök. Fimbulwinter is three successive winters where snow comes in from all directions, without any intervening summer. During this time, there will be innumerable wars and brothers will kill brothers. The prefix 'fimbul' means "the great/big" so the correct interpretation of the word is "the great winter". There have been several popular speculations about whether this particular… (More on Fimbulwinter)