WebGL2 required — the filament cannot render here.
the bit that remembers
Silver at one end, gold at the other. Apply a voltage and a silver filament grows across the gap: reach the gold and it bridges — low resistance, the current flows. Reverse it and the filament dissolves — the gap returns, high resistance. Gold removed and silver remains, or gold stays and silver leaves — exactly one, and the cell remembers which.
The signature is the pinched loop: at zero volts, zero current — but the resistance depends on the whole history of charge, not the moment. Chua’s fourth element; a bit with no power.