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The original was posted on /r/whatisthis by /u/noitsbetsy on 2023-08-01 16:10:05.
Original Title: I woke to find this mysterious black powder on a section of my kitchen counter. The photo is of the paper towel I used to wipe up the substance, although you can see the little powdery speckles on the countertop just below the paper towel.
