MotherBoard: Last winter's succession of cold snaps across the United States led some scientists to postulate that periods of brutal cold might actually be a global warming-related phenomenon, and will likely increase in frequency as climate change progresses. The idea, essentially, is that warm water is becoming more and more exposed to Arctic air as ice coverage diminishes, leading to a convection effect as warming air circulates with typically cold polar air, and the pushing of that cold Arctic air toward...