There are Magnetic bacteria but this is certainly just heat/moisture related.
Comment on Double Plug Experiment
randamumaki@lemmy.blahaj.zone 2 days ago
Could it be electromagnetic fields making it grow in that pattern?
pigup@lemmy.world 2 days ago
FiniteBanjo@feddit.online 2 days ago
It’s probably that the plaster around the outlet when they installed it is mold resistant.
garibaldi_biscuit@lemmy.world 2 days ago
And/or paint