In 2018, RNA extracted from trained sea snails caused untrained animals to behave as though they remembered shocks they had never received. The experiment revived a discarded line of research that began with flatworms being cut apart, regenerated, and fed to other worms. This episode traces the rise and collapse of James McConnell’s memory-transfer experiments, the controlled Aplysia study that reopened the question, and the competing explanations for what the RNA may actually have moved. The effect has not been extended to mammals, and the molecules responsible remain unidentified. ─────────────────────────────── IN THIS EPISODE— Memories apparently surviving the regeneration of a new brain— The cannibalism experiments that failed their controls— RNA from trained sea snails changing untrained animals— Why memory may be partly instruction rather than wiring SOURCESJames V. McConnell, Journal of Neuropsychiatry, 1962Hartry, Keith-Lee & Morton, Science, 1964Shomrat & Levin, Journal of Experimental Biology, 2013Bédécarrats et al., eNeuro, 2018Failure to Classically Condition Planarian Flatworms, bioRxiv preprint, 2026 ─────────────────────────────── Narration in this episode is AI-assisted. Research, writing, and editorial decisions are human. Reality Is Strange — real phenomena, verified, and stranger than they should be.

The RNA Injection That Seemed to Transfer a Memory

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