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Old Mrs. O’Leary’s … comet?

Campfire songs notwithstanding, it may well be that the Great Chicago Fire of 1871 (which killed 300 and burned much of the city) was caused by errant pieces of comet…

Campfire songs notwithstanding, it may well be that the Great Chicago Fire of 1871 (which killed 300 and burned much of the city) was caused by errant pieces of comet — a sobering thought in the context of possible asteroid strikes.

New research lends credence to an alternative explanation: The fire, along with less-publicized and even more deadly blazes the same night in upstate Wisconsin and Michigan, was the result of a comet fragment crashing into Earth’s atmosphere.

[…] Wood cited eyewitness reports of spontaneous ignitions, lack of smoke and “fire balloons” falling from the sky to bolster his theory. If the fire had been caused by comet debris, which is believed to have consisted of small pieces of frozen methane, acetylene or other highly combustible chemicals, it also would explain the cause of the fires blazing north of Chicago, which wiped out 2,000 people and burned 4 million acres of farm and prairie lands.

The deceased included many who showed no signs of being burned, Wood said. “This would be consistent with either the absence of oxygen or the presence of carbon monoxide or carbon dioxide above lethal levels,” — a rare — but not unprecedented — situation in large forest fires.

In all, over a 24-hour period, an area of land the size of Connecticut was burned. Wood speculates the main body of the comet crashed into Lake Michigan, with peripheral fragments causing the fires in Chicago, Wisconsin and Michigan.

Yikes.

(via Cronaca)

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