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A friend showed me an article saying that there's evidence that a piece of Halley's comet may have struck the earth about 1,500 years ago. Is anyone here aware of such evidence?

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The talk at AGU was last Wednesday, guess we'll have to wait for the proceedings. Seems to be pretty new. blogs.ei.columbia.edu/2013/12/06/… –  Alexander Janssen Dec 19 '13 at 21:10
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I have not read the complete scientific article, but I'm not prone to trust this. On that year the Chinese civilization were quite well established and annotating about comets, and I have not read about them annotating about a comet that approached so much to Earth.

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