That's the date the Tunguska event occurred - a large meteor or comet asploded above the forest in the Tunguska region of Siberia. The resulting explosion knocked down millions of acres of trees, and lit up places like London, thousands of miles away - Londoners were reportedly able to read at night by the resulting light of the event.
According to a report in this month's Scientific American, a group of Italian scientists believe they've located a meter-wide remnant that continued down to Earth and created a small lake with its impact crater.
The Italians are going to try to recover the meteorite and prove once and for all that the event was caused by something natural, and not by the midair collision of alien spacecraft or something quasi-bizarre like the passing of a mini-black hole through the Earth.
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