There are bacteria in the seafloor that conduct electricity over more than a centimetre.
Down in oxygen-free mud, cable bacteria strip electrons from sulfide and pass them up to oxygen. The current runs through fibres made of nickel proteins – at an estimated current density similar to household copper wiring.
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Nº 066 · Nature · 50 sec
A brainless slime mould designed a network like Tokyo's railways
Oat flakes were laid out like the cities around Tokyo. After about a day, a yellow single cell had linked them – much like the real rail network.
