Nobody knows who she is, only different: a teenager from more than 50,000 years of unusual uniqueness that looked like a "hybrid" ancestor of modern humans that scientists had never seen before.
Only nowadays the researchers have found evidence that they are not alone. In a new study that analyzes the complex mess in the prehistory of humankind, scientists have used artificial intelligence (AI) to identify unknown types of ancestors that contemporary people encountered – and shared with dialects – on long journeys from Africa millennia ago.
"About 80,000 years ago, so-called Out Africa, when a part of the human population, which consisted of modern people, left the African continent and migrated to other continents, prompting all current populations," explains evolutionary biologist Jaume Bertranpetit from Pompey University Fabra in Spain.
As modern people worked this time into the mainland of Eurasia, they also spotted some other things – the ancient and extinct hominids of other species were bred.
Recently, these occasional sexual partners were considered to include Neanderthals and Denisovans, the last of whom were unknown until 2010.
But now the third former was long isolated in the Euro-Asian DNA, thanks to deep learning algorithms that study the complex mass of ancient and modern human genetic code.
Using the statistical technique known as the Bayesian conclusion, researchers have found evidence of what they call "third introgression" – a "spiritual" archaic population with which modern people crucified during African exodus.
"This population is either linked to Neanderthal Denis or early separated from Denis's brain," researchers write in their work, meaning that it is possible that this third population in the sexual history of mankind might be interfering with Neanderthals and denizens.
In a certain sense, from the point of view of deep learning, it is a hypothetical confirmation of the type of hybrid fossil of a teenager identified last year; although they are early days, and the research projects themselves are not directly related.
"Our theory coincides with hybrid samples that we recently discovered in Denis, although we can not yet exclude other opportunities," says one of the teams, genomist Mayukh Mondal of the University of Tartu, Estonia.
Considering this, the discoveries created in this area of science come to fruition quickly and quickly.
Last year, another research team identified evidence of what they called the "definitive third crossing event" with Denisovance and Neanderthal, and a couple of papers published just two weeks ago followed the time sequence as these extinct species crossed and crossed clearer than ever before . ago.
Much research is still needed. The use of this kind of AI analysis is a remarkably new technique in the field of human origin, and the known fossil evidence we face is incredibly scarce.
But, according to the research, what the team found is explaining not only the long forgotten process of introgression – it is the enthusiasm that in its way informs us about who we are today.
"We thought we were going to try to find those places with high genomic differences, see which Neanderthals and Denisans are, and then see if that will explain the whole picture," Bertranpetit said. Smithsonian.
"As it happens, if you take away the Neanderthal and Denisian parts, there is still something in the genome that is very divergent."
Findings are recorded in Nature Communications.