reason an effort must be made to characterize them Researchers from the National Museum of Natural Sciences and the Autonomous University of Madrid (UAM) have confirmed that the Neanderthal Man’s thorax was considerably broader in its lower part than that of Homo sapiens , which would be linked to higher oxygen consumption. The results are based on the analysis of fossil remains from the El Sidrón cave (Asturias). The Homo neanderthalensis is an extinct relative of the Homo sapiens who has been in the focus of the scientific community for over 150 years. One of the biological factors that most characterize him is his great muscle mass. This, according to specialists, would entail a contribution of air to the body that is also large, since muscle

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tissue is a great consumer of O2. This high oxygen Peru WhatsApp Number List consumption should be reflected in the rib cage. However, this has not yet been verified by traditional methods, since the ribs and vertebrae generally appear fragmented or deformed in the fossil record. Now, paleoanthropologists from the Autonomous University of Madrid (UAM) and the National Museum of Natural Sciences (MNCN), using techniques such as 3D geometric morphometry, have been able to know what the thorax of the Neanderthal man was like. The specialists studied more than 100 thoracic remains (ribs and vertebrae) from the El Sidrón site (Asturias, Spain), along with remains from other Neanderthals (Kebara 2, Shanidar 3, Tabun 1, La Chapelle-aux-Saints). The results were

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published in the Journal of Human Evolution . Virtual reconstruction After a task of reconstruction of ribs and vertebrae using 3D techniques, the authors concluded that Neanderthals would be characterized by a relatively shorter rib cage and that it would be wider in its lower part than in Homo sapiens (see figure) . “As the diaphragm, one of the muscles most involved in respiration, is located in the lower part of the thorax, an expansion of this area could give Neanderthals greater respiratory power and a greater entry of air into the body due to a greater diaphragmatic contribution ”, assures co-author Daniel García Martínez, from the Virtual Morphology Laboratory of the MNCN and a doctorate from the UAM. “This greater entry of air into the body would be

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