To neuron or not to neuron…

"If an intracellular mechanism for memory exists in brainless, unicellular organisms, then it’s possible we inherited some form of it, given the advantages it presents. 

"All eukaryotic cells, including our own, trace their evolutionary origins to a free-living ancestor. 

"That legacy echoes in our every cell, yoking our fates to the vast unicellular realm, where creatures such as protozoans navigate threats, seek succor and sense their way from life to death."

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