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The Conversation ·For the curious

Learning Without a Brain – How Bacteria Store Memories and Remember the Past Like Artificial Neural Networks

by Shiladitya Banerjee, Associate Professor of Physics, Georgia Institute of Technology

Published 2026-09-10 12:44:34+00:00

How exactly does a single cell hold onto a memory without a brain?

0:00 / 7:05 · Narrator Sulafat

Context

Learning is usually treated as a habit of the brain. But a single bacterium living in the human gut has to survive sudden floods of food and sudden droughts. To do that, it keeps a chemical record of its past. In an essay published on 10 September 2026, a team of researchers tracks tens of thousands of E. coli cells to figure out exactly how a microbe remembers. What they find is a biological system that stores information using the exact same mathematical logic as modern artificial intelligence.

Show notes

A report on how single-celled bacteria learn and store memories without a brain. By tracking thousands of E. coli cells through changing nutrient levels and modeling their growth, researchers found that bacteria use ribosomes to record their past. The study shows that these chemical networks process information using the same logic as artificial neural networks, offering a biological model for energy-efficient AI and new targets for treating infections.

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