Seven thousand years ago, the Sahara was not a desert. Across what is now some of the most arid land on Earth, a wetter climate had filled lakes, fed rivers and spread grasslands where herders grazed cattle and sheep. In a rock shelter in southwestern Libya, two women who lived in that lost green world were buried and naturally mummified, and the DNA recovered from their remains has revealed a branch of humanity that no one knew existed.
Two mummies from a vanished landscape
The remains come from Takarkori, a rock shelter in the Tadrart Acacus mountains of southwestern Libya, where archaeologists excavating between 2003 and 2006 uncovered the skeletons of roughly fifteen individuals, most of them women and children. The dry conditions of the shelter had preserved two of the bodies as natural mummies, and that preservation proved crucial. Genetic material degrades quickly in hot climates, and the Sahara has yielded almost no usable ancient DNA, so the survival of readable genomes from remains this old in this region was itself a rare stroke of scientific fortune.
The two women lived during the African Humid Period, an interval sometimes called the Green Sahara, when monsoon rains transformed the region into a mosaic of wetlands and savanna. The people at Takarkori were pastoralists, keeping domesticated livestock, and their culture is part of a broader story about how herding spread across North Africa. Recovering their DNA offered a way to test a central question about that spread: whether the animals and the herding lifestyle arrived with waves of incoming people, or whether local populations adopted the practice from their neighbors.
An ancestry unlike any living population
When researchers sequenced the genomes, the results did not match any expected pattern. The Takarkori individuals belonged to a long-isolated and now-extinct North African lineage, one that had never been documented before. According to the analysis, the great majority of their ancestry, on the order of ninety percent, derived from a previously unknown North African population that had remained genetically separate from other groups for tens of thousands of years. The peer-reviewed study reporting the finding was published in the journal Nature, which laid out the genetic evidence for an ancestral North African line distinct from anything living today.
The timing of the lineage’s origin is what makes it so striking. The Takarkori ancestry appears to have split from sub-Saharan African populations at roughly the same moment that the ancestors of everyone outside Africa were branching off, around fifty thousand years ago. Yet instead of migrating out of the continent or blending back into the populations around it, this North African group stayed put and stayed isolated, preserving a deep and separate genetic identity across an enormous span of time. It is, in effect, a fossil of human diversity that persisted in place long after related lineages had scattered across the globe.
What the genes say about migration and mixing
The genomes also settled the question about how herding reached the region. The Takarkori DNA carries no significant sub-Saharan African ancestry, which means the two women were not the product of populations moving up through the Sahara from the south. That absence argues that the green corridor, despite being lush and habitable, did not serve as a busy highway funneling people between northern and sub-Saharan Africa. Instead, the herding way of life appears to have arrived through cultural exchange, with local North African communities adopting livestock and pastoral techniques from outside groups rather than being replaced by newcomers.
A second genetic signal concerns Neanderthals. The Takarkori individuals carried some Neanderthal DNA, but far less than is found in people living outside Africa today, while still carrying more than contemporary sub-Saharan Africans typically do. That intermediate level suggests the North African lineage picked up a small trace of Neanderthal ancestry through limited contact with populations that had already left the continent and interbred with Neanderthals, without experiencing the fuller mixing that shaped non-African genomes. The research team that led the work, based at the Max Planck Institute for Evolutionary Anthropology, framed the result as evidence that these ancient North Africans were connected to the wider human story only by thin genetic threads, and its account describes how the first ancient genomes from the Green Sahara were deciphered.
Why a lost lineage matters now
The discovery reshapes the picture of North Africa’s deep past, a region whose genetic history had been largely a blank because ancient DNA so rarely survives there. It shows that the population who lived through the Green Sahara were not simply an offshoot of better-known groups but the carriers of an ancient, endemic branch of humanity that has since disappeared as a distinct lineage, its traces now diluted or absent in living people. That extinction of a whole genetic line, without a dramatic catastrophe, is a reminder of how much human variety has vanished quietly over the millennia.
It also underscores how a single fortunate case of preservation can rewrite a chapter of prehistory. Two mummified women in a Libyan rock shelter have, through the survival of their DNA, opened a window onto fifty thousand years of isolated ancestry and clarified how a way of life spread across a continent. Coverage of the find has emphasized that these 7,000-year-old skeletons revealed a previously unknown human lineage, and researchers hope that further work in the region, wherever conditions allow ancient DNA to endure, will fill in more of the story the desert has kept hidden for so long.
This article was produced with the assistance of AI and reviewed by the Morning Overview editorial team.
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