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US Scientists, In A First, Used Geobacter Sulfurreducens Bacteria To Create Protein Nanowires For Ultra-Efficient, Bio-Integrated Artificial Neurons That Mimic Real Neurons. It Senses Natural Signals (~0.1V) With Low Power Use (1/10th Voltage, 1/100th Power). While Sustainable & Brain-Like, Scaling Issues Hinder Full Computing Replacement.

UMass Engineers Create First Artificial Neurons That Could Directly Communicate With Living Cells : UMass Amherst

https://www.umass.edu/news/article/umass-engineers-create-first-artificial-neurons-could-directly-communicate-living

A team of UMass Amherst engineers announced the creation of an artificial neuron with electrical functions that closely mirror those of biological ones.