PodCompanions
Discussions: 2026-W43 — page 58
Discussions added each week. These are publication dates here; the original episodes may be older.
- 1:05:55–1:07:55
Reich discusses shared human capacities and describes selection detected in the study’s sampled populations.
- 0:00–5:00
Reich explains why detecting selection needs many ancient samples and distinguishes it from reconstructing population relationships.
- 2:04:15–2:09:15
Reich describes independent trait-association checks, selection thresholds and tests addressing background selection and other possible confounders.
- 1:59:15–2:04:15
Reich explains how genetic relatedness informs predicted allele frequencies and how the model tests for additional time-associated change.
- 1:22:00–1:27:00
Reich sketches a speculative expansion-and-mixture model intended to connect Neanderthal and modern-human histories.
- 33:00–37:44
Patel and Reich discuss how migration and selection affect polygenic predictors, then consider the demands of hunter-gatherer life.
- 28:00–33:00
Reich explains polygenic predictors from modern association studies and discusses their application to ancient samples.
- 1:13:20–1:17:00
Reich distinguishes genetic evidence from speculative explanations of farming’s timing; Patel raises comparisons with later technological development.
- 1:45:56–1:49:27
Reich uses an astronomy analogy to discuss how accumulated assumptions can make a historical model increasingly complicated.
- 37:44–42:14
Reich describes the Icelandic education-associated score result and discusses possible behavioural explanations and cross-population checks.
- 5:00–10:00
Reich distinguishes random change, migration and directional selection, explaining why ancestry shifts can complicate interpretation.
- 1:41:33–1:45:56
Reich discusses possible biological barriers and Patel questions whether similar technologies require shared population history.
- 23:15–28:00
Reich describes selected variants related to metabolism and blood traits, then discusses why short recent histories offer limited detection power.
- 49:00–52:23
Reich discusses possible reasons selection on one trait might oppose another, while treating the explanations as hypotheses.
- 1:09:01–1:13:20
Patel and Reich consider climatic stability as a possible explanation for agriculture’s timing, while acknowledging uncertainty.
- 1:54:15–1:59:15
Reich revisits earlier selection studies, describes the enlarged dataset and explains why his expectations changed.
- 15:00–19:17
Reich reports stronger selection in the sampled Bronze Age period and considers changing environments as possible explanations.
- 52:23–55:55
Reich discusses changing body-fat predictors and distinguishes persistent food availability from occasional severe famine.
- 1:17:00–1:22:00
Reich explains discordant mitochondrial, Y-chromosomal and genome-wide relationships among modern humans, Neanderthals and Denisovans.
- 1:32:00–1:36:53
Reich discusses uncertain African population structure and uses later migrations as analogies for cultural influence despite diluted ancestry.
- 1:04:00–1:08:10
Marblestone considers what wiring diagrams could reveal about architectures, learning rules and acquired circuit details.
- 59:52–1:04:00
Marblestone compares computational vocabulary, detailed simulation and empirical model testing as complementary approaches to neuroscience.
- 1:35:23–1:39:57
Marblestone describes ambitions for provable AI systems, then discusses structured representations and unresolved questions about cognitive models.
- 1:30:45–1:35:23
Marblestone discusses the scope of software guarantees and considers how automated mathematical tools could change research practice.