On November 8, 1819, the inhabitants of Canada experienced something that remains one of the greatest meteorological mysteries in history. On this day, known as "Sunless Day", the sky over Canada was covered with thick, dark clouds and the sun took on a strange, greenish tint.
As reported by "Scientific American", this event began on Sunday morning, when the sun, illuminating, took on an unusual hue. Soon, the entire sky was covered with heavy, black clouds, and from them came a downpour that turned out to be something like a soap solution. After it fell, a substance resembling soot fell to the ground.
Throughout the day, the sky changed color - from dark green, through black, to yellow and blood red. The clouds were getting thicker, and at noon many buildings had to turn on artificial lighting. Residents were concerned and had various theories about the causes of this unusual phenomenon - from forest fires to volcanic eruptions.
The day culminated in a violent thunderstorm that led to the fall of the cross on top of the church. Only the next day everything returned to normal and the sky was clear and transparent again.
This unusual atmospheric phenomenon was observed not only in Montreal, but also in other areas of Canada, as far as Kingston, and even in the United States. Although over 200 years have passed since those events, scientists are still unable to fully explain the causes of the "Day Without Sun". It remains one of the greatest meteorological mysteries in history.
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