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A comment on Mass Extinction and the Structure of the Milky Way (2013). Parent comment

Re:Mass Extinction and the Structure of the Milky Way (2013) by kyberias on Monday May 08, 2017 @05:40AM (#14290293)
We can assume events of this magnitude can be seen with naked eye. It the the Moon after all. Apparently this is based on recorded eye witness testimony.
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