In the year 536 AD the sun dimmed, and the gloom lasted for more than an entire year. There were frosts and snows in the middle of summer and observers reported that winter never really ended. The sudden shift in climate lead to famine, plague and the fall of empires. What was worse, that year was only the beginning of a shift in climate that brought misery to the entire Northern Hemisphere for more than a century. Yet this well documented period of global cooling was smoothed away by climate change alarmists in works of fabricated data like the infamous “hockey stick” tree ring history. A new analysis has rediscovered this dark period in recent human history, fittingly made possible by new tree-ring measurements from the Altai mountains in Russia.