“If you look at across the entire animal kingdom at how low genetic diversity is, modern humans are at the low end, but they're not off charts. Neanderthals are off charts. They were a population that must have been going through repeated population crashes, difficult environments, and just hanging on and losing diversity all the time.”
quote is from the automated transcript, cleaned for reading:
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More from David Reich
PredictionNot checkable as stated
Reich: Modern medical care will worsen human genomic health over centuries
“Allowing people to live who would not have done so before through in vitro fertilization or through having glasses, despite correcting very bad eyesight, and as a result, it's probable that there are mutations building up that would not have been building up i…”
David ReichJan 2, 2019▶ 27:35a16z Podcast | The Scientific Revolution of Ancient DNA
AssertionSupported
Reich: Unidentified Denisovan fossils are already sitting in East Asian museums
“Well, I think it's almost certainly the case that there has been a fossil record found, and it's staring us in the face in museums all around East Asia. So I think if you go to Southern China, or you go to Southeast Asia, or you go to parts of Russia, you will…”
David ReichJan 2, 2019▶ 12:03a16z Podcast | The Scientific Revolution of Ancient DNA
AssertionSupported
Reich: Modern human populations are almost entirely products of mass migration
“But what we now know is that that's almost never true, and that the people who live in any one place today are almost always The result of layers and layers of mass migration and population mixture convulsively replacing and changing each population over time,…”
David ReichJan 2, 2019▶ 17:30a16z Podcast | The Scientific Revolution of Ancient DNA
Insight
Reich: The family tree model for human populations is hopelessly wrong
“I think we have abandoned the idea of a family tree for thinking about human populations. I think that that model is just so hopelessly wrong that we actually have to think about new mental pictures to think about our relationships to each other.”
David ReichJan 2, 2019▶ 18:18a16z Podcast | The Scientific Revolution of Ancient DNA
AssertionSupported
Reich: European ancestry in African Americans is four-to-one male-derived
“African Americans today have about 80% ancestry from West Africans and about 20% ancestry from Europeans with a lot of variation. But the European ancestry in African Americans comes four to one from the male side. So very little of it comes from European wome…”
David ReichJan 2, 2019▶ 23:44a16z Podcast | The Scientific Revolution of Ancient DNA
AssertionSupported
Reich: India's genetics show sex-biased admixture 3,000 to 4,000 years ago
“If you look in people in India today are the result of a massive convulsive mixture between two groups that occurred around three or 4000 years ago, and we now know that from lots of lines of evidence, including ancient and modern DNA analysis. Now that proces…”
David ReichJan 2, 2019▶ 24:23a16z Podcast | The Scientific Revolution of Ancient DNA
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