At the end of every year, we tend to grumble about how terrible it was. Political upheavals, mass shootings, global warfare and environmental disasters all make us think that whatever year we just (barely) got through had to have been the worst. But historians would like to remind us that we have it pretty good, at least compared to those poor saps who had to live through A.D. 536 — the year they declared the worst in human history. What made A.D. 536 just so awful? For starters, we lost the sun. There goes the sun Sometime early in 536, a thick haze covered Europe, the Middle East and some of Asia. The sun was visible, but that good, life-giving warmth wasn't breaking through the fog. "For the sun gave forth its light without brightness, like the moon, during the whole year," Byzantine historian Procopius observed . Other reports from this hazy time include a summertime snowfall in China, and Europe experienced "spring without mildness, summer without heat....