Looking through the window of my office I made this strange observation: Structures inside the double-glazed insulated window can be seen resembling fungal mycelia.

If you go to my profile then you can have a look at the pictures (I labeled some spots in red)! Has anybody observed similar phenomena? Or is it simply chemical precipitation? It is impossible to take samples unless you break the glass!

More Helmut Brandl's questions See All
Similar questions and discussions