> ## Content Index > Fetch the complete content index at: https://goodoil.news/llms.txt > Use this file to discover other available public pages before exploring further. # Through a Genetic Lens, Darkly - URL: https://goodoil.news/through-a-genetic-lens-darkly/ - Published: 2026-09-05T20:00:11.000Z - Updated: 2026-09-05T20:00:10.000Z - Description: Not so much a ‘missing link’ as a jigsaw piece we didn’t even know was missing. - Author: Lushington Brady - Tags: Science, History There are a lot of popular myths and misunderstandings about the science of palaeontology. Anyone whose spent days of patient scratching in the mud at a dig knows perfectly well that you don’t just casually brush aside a thin layer of dirt and a fossil magically appears. What most people also don’t realise is just how vanishingly rare fossilisation is. It’s estimated that less than one-tenth of one per cent of living organisms become fossils. The nature of fossilisation means that that ratio is heavily skewed to marine organisms. So, it’s little wonder that there can be large gaps in the fossil record. This is what originally led to what is now a long-outdated notion of a ‘missing link’. But genetics has opened another window into the past. In the *Dune* books, Paul Atreides uses his genetic heritage and the abilities of the Bene Gesserit to access ancestral memories, allowing him to see the past through the experiences of his forebears. In reality, scientists are able to use DNA to similarly peek back into the past. What they’re discovering is not ‘missing links’, but the pieces to fit in what amounts to a jigsaw puzzle missing a few pieces. The cartoon version of human origins still lurks in school posters and television voiceovers: a tidy parade of stooped ancestors, one empty pedestal labelled ‘missing link’, and then us, standing upright and looking pleased with ourselves. The real picture is far more complex. Years ago, geneticists showed that *Homo sapiens* had not marched out of Africa in splendid isolation. We interbred with Neanderthals and Denisovans: cousins we can name because their DNA was pulled from actual remains. Other branches left no convenient femur in a cave. They survive only as shadows in our chromosomes: lineages with no reference genome of their own, spotted because modern DNA contains stretches that do not belong to the family tree we thought we had. Ghosts, in the jargon. Until now, those ghosts were smears on the glass. Researchers could tell something had mixed in. They could not say when, or how far back the stranger had split from the line that became us. A team reporting in *Science* has built a way to work backwards from the genomes of people alive today and reconstruct the missing joins. They call the method TRACE. Think of every genome as a mosaic. Different stretches of your DNA have different family trees. Some branches are recent. Some disappear into deep time. TRACE hunts the deep ones. > [“The most fundamental](https://edition.cnn.com/2026/08/26/science/ghost-lineage-dna-human-ancestors?ref=goodoil.news) question that most of us have is, ‘Why are we here? Where do we come from?’ And these genealogies really allow us to look into the past in a way that we have not been able to do before,” said **Priya Moorjani**, study coauthor and an associate professor in the department of molecular and cell biology at the University of California, Berkeley. Moorjani and her team ran TRACE across more than 500 modern genomes from Africa, Europe and Asia. Two unknown ancestors stepped out of the genetic shadows. > One of the unknown ghost ancestors described in the new study likely interbred with humans in Africa before the migration event. The researchers estimate that DNA inherited from this lineage makes up about 0.5 per cent to one per cent of the genomes of people living today – almost the same percentage as Neanderthal DNA currently found in many modern humans. > > The second lineage is much older. The researchers refer to it as a “super-archaic” ancestor because it traces back to a branch of the human family tree that split roughly 1.8 million years ago. This hominin appears to have interbred with Denisovans in Eurasia more than 200,000 years ago, with some of its DNA eventually reaching modern humans through our interbreeding with Denisovans. A ghost twice removed, still lurking in the living DNA. Nobody has sequenced bone from either population. Candidates are the usual suspects of the Middle Pleistocene. The younger split is in the right era for African *Homo heidelbergensis*. The deeper one might be a Eurasian relative of *Homo erectus*. Speculation, until someone gets lucky with a fossil that still holds molecules. None of this should shock anyone who has been paying attention. Gene flow is not a scandal. It is the default. Populations meet, fight, trade and occasionally do the other thing that keeps anthropologists in business. We have only lately become able to read the receipts in people who are still breathing. No missing link. Just a jigsaw that was always a jigsaw. The empty sockets were not proof of a leap. They were proof that most lives leave nothing but descendants: and that the descendants, if you know how to read them, are still carrying their ancestors’ stories. --- 💡 ****If you enjoyed this article please share it using the share buttons at the top or bottom of the article.**