I found this under my mattress – at first I thought they were insect eggs, but the reality really surprised me.

I found this strange pile under my mattress at first, I thought it was insect eggs. The truth? Way more amazing.
That afternoon, I decided to flip the mattress and wash the sheets. Everything seemed normal until I noticed a cluster of tiny black grains tucked into the corner of the bed.

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They were dull yet slightly shiny, like miniature pieces of coal.