Inner Cosmos with David Eagleman Ep143 "How do things last?" Part 1: neurons to civilizations
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Mar 2, 2026 Why do some things endure while others vanish? The show explores persistence from neural moments that stitch music and motion to cultural and material longevity. Hear stories about Greek fire, Roman self-healing concrete, sharks and tools that resist change, and why myths and religions outlast facts through redundancy and replication.
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Brain Holds Sound To Make Music And Language
- The brain extends fleeting sensory inputs into short-lived internal persistence to create meaning for speech and music.
- Melody and words exist because prior notes or phonemes remain active in neural circuits long enough to overlap with incoming signals.
Visual Persistence Lets Movies Work
- Visual persistence stretches brief flashes into longer conscious experience, enabling perceived motion and movies.
- Flicker fusion (~55 Hz) shows successive still frames fuse because neural activity overlaps across time, creating continuity.
Longer Persistence Seen In Schizophrenia
- Persistence windows vary across brains; people with schizophrenia show longer visual persistence and lower flicker fusion thresholds.
- This difference allowed David Eagleman to develop a visual diagnostic test for schizophrenia currently studied at Stanford.