Shelves lined with conical flasks and petri dishes, most of them empty with dried ring-shaped stains at the bottom.

What you thinkThe petri dish lids are numbered with marker pen, from 01 all the way to 40, with seven missing in between. The empty spots where numbers are missing have accumulated dust, clearly having been empty for a long time—not taken by someone, but never put back from the very beginning.

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