Vue d'artiste d'une jeune Dénisovienne. © Maayan Harel

Denisova-Zahn shows they had more territory than previously thought

Could Denisova Man, whose remains previously came from Siberia and Tibet, also have had a presence much further south? The discovery of a tooth from a young Denisova seems to indicate that the species has also been found in Southeast Asia in vastly different climates and where it may have encountered other human species.

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Who was Denisova’s enigmatic man? The Denisovans were close cousins ​​ofhomo sapiensrubbed his shoulders with him and even bred with him. The last common ancestor of Denisovans and modern man dates from -700,000 to -500,000 years ago. If these last points suggest that the Denisovans are well known to anthropologists, it’s quite the opposite. Something Genoa of this mysterious species could have been sequenced, the appearance The theories established by physics apply within a well-defined framework.
Physics…” data-image=”” data-url=”https:// news” data-more=”Read more”>physically and the culture of the Denisovans are very little known.

Little is known about the appearance and culture of the Denisova people.

In fact, material evidence of the existence of this species so far has been based on the discovery of rare remains found on the plain of the Tibetan Plateau and in the Denisova Cave in Siberia, which gave the species its name. It was therefore assumed that the range of Denisova’s man was limited to northern Asia. However, a research team recently published in the newspaper nature communication the discovery of a new fossil that overturns this last hypothesis and provides new elements to the knowledge of Denisova’s people.

Adaptations to different climate zones

Indeed, the authors of the study present the analysis of a new fossil attributed to a member of the Denisovan species. This is a fossil tooth found in a cave in northern Laos (more than 4,000 kilometers south of Denisova Cave).

The authors suggest that this molar tooth belonged to a child between the ages of three and a half and eight and a half, as the roots of the teeth are not yet fully developed. In addition, lacking in the composition of tooth enamel and repair
The enamel mineral mass contains calcium salts and…” data-image=” jpg” Data-URL=”” data-more=”Read more”>E-mail of some We speak of dipeptides, tripeptides if…” data-url=”” data-more=”Read more”>peptides linked to chromosome Y suggests that the child was a girl. The dating of the tooth places the child’s life at between 164,000 and 131,000 years ago. This age corresponds to a time when there were several human species including the Denisovans, homo sapiens, H.neanderthalensis and H.erectus. One of the study’s co-authors, Dr. Shackelford, however, explains that if the presence of Denisova people has been suspected far to the south of Siberia, it has never been physically proven. The presence of this tooth in Laos was unexpected for the team, but they are confident the molar belongs to a Denisovan. This molar is indeed similar to those found on the Denisovan jawbone in Tibet and is remarkably very large, which is one of the characteristics of this species.

The tooth of a young Denisovan was scanned and the authors were able to analyze (a) the surface of the enamel and (b) the junction between enamel and dentin, making it possible to determine to which species the molar belonged.  © Demeter et al., 2022

The writers initially thought it belonged H.erectus but the morphology of the molar tooth turned out to be “too complex” for this species. DNA structure analysis
DNA is a very long molecule made up of a series of nucleotides linked by phosphodiester bonds. There are four…” data-image=”” data-url=”https:/ /” data-more=”Read more”>DNS have yet to be performed to confirm that the molar belongs to a Denisovan. The presence of Denisovans in Laos would mean that individuals of this species could adapt to very different environments and climates, such as the frigid ones in Siberia and Tibet and the sparsely forested and temperate ones in northern Laos. Almost all of these thermoplastic polymers exhibit significant plasticity.
Indeed, when a certain constraint is applied to…” data-url=”” data-more=”Read more “>plasticity would be more similar to thathomo sapiens than those of the Neanderthals, who are more generally adapted to cold climates. This discovery of a Denisovan in Southeast Asia opens promising prospects for the discovery of new remains of extinct human species in this region.

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