Microbial memory - an infectious idea

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Microbes Have Memory: Surprising Parallels Between Simple Microrganisms and Sophisticated Neurons

Discovery draws surprising parallels between low-level organisms and sophisticated neurons; lays the groundwork for memory-capable biological systems. Biologists studying collectives of bacteria, or "biofilms," have discovered that these so-called simple organisms feature a robust capacity for me

scitechdaily.com

Fascinating bit of work on chemical memory...