A Cell of a Story is a science podcast that asks why the human body still does things evolution never bothered to fix — and what that tells us about where medicine is headed next.
The Brain in Your Gut: From an Ancient Nervous System to Bioelectronic Medicine
The enteric nervous system can coordinate huge amounts of digestive activity without asking the brain for instructions. This ancient neural network communicates with the brain through nerves, hormones, immune signals and microbial metabolites. Researchers are now exploring vagus-nerve stimulation, microbiome interventions and other ways of deliberately modifying that gut-brain communication.
17 Aug 2026
Human Sonar: The Sense Evolution Never Gave Us—but the Brain Can Learn
Episode description:
Bats evolved biological sonar hardware. Humans did not. Yet trained blind echolocators can use tongue clicks and reflected sound to build surprisingly detailed spatial representations, demonstrating how flexible the human brain can be. Modern sensory-substitution devices are taking that principle further with ultrasound, cameras, AI and wearable feedback.
16 Aug 2026
The Heart That Forgot How to Regenerate
Episode description:
Some fish regenerate damaged heart muscle. Adult human hearts largely replace major injury with scar tissue. Researchers are now trying to reactivate regenerative pathways that remain inside mammalian biology, including tightly controlled activation of YAP, a protein involved in cell growth and tissue repair. A reversible YAP gene-therapy system improved cardiac repair in animal models in 2025.
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