You wake up to a dark, dreary, glum-feeling, Monday-type of morning. For the 547th consecutive day. Just 18 months prior, you were a hard-working farmer gearing up for another bountiful crop season. But then the skies went dark . From early 536 to 537, they stayed dark . Across much of eastern Europe and throughout Asia, spring turned into summer and fall gave way to winter without a day of ...