As a result, in considerations of the biology of late archaic humans such as the Neandertals, it is common to compare them to living humans and largely ignore the biology of the early modern humans, the ones who were close in time to the Neandertals and other non-modern humans across the Old World.
In this context, an international team of researchers,* including Erik Trinkaus, professor of anthropology at Washington University in St. Louis, has reanalyzed the complete immature dentition (comprising all of the deciduous and almost all of the permanent teeth) of a 30,000 year-old-child from the Abrigo do Lagar Velho, Portugal.
Their research was published the week of Jan. 4 in the Proceedings of the National Academy of Sciences.
The micro-tomographic (μCT) study of the dentition investigated the relative stages of formation of the developing teeth and the proportions of crown enamel, dentin and pulp in the teeth. The study documented that, for a given stage of development of the cheek teeth, the front teeth were relatively delayed in their degree of formation. Moreover, the front teeth show a greater percentage of the total tooth volume with dentin and pulp, or conversely the front teeth have proportionately less enamel than among recent humans. These patterns in the Lagar Velho dentition fit the pattern evident in the preceding Neandertals, and they contrast with the ones known for later Pleistocene (12,000 year old) and living modern humans.
The new analysis of the Lagar Velho child thus joins a growing body of information, from other early modern human fossils in Europe (from Mladeč in the Czech Republic, Peştera cu Oase and Peştera Muierii in Romania, and Les Rois in France) shows that these “early modern humans” were “modern” without being “fully modern.” Human anatomical evolution continued after they lived 30,000 to 40,000 years ago.
* The team was led by Priscilla Bayle (Muséum National d’Histoire Naturelle, France) and Roberto Macchiarelli (Université de Poitiers, France) and included Trinkaus, Cidália Duarte (Câmara Municipal do Porto, Portugal), Arnaud Mazurier (CRI-Biopôle-Poitiers, France) and João Zilhão (University of Bristol, UK).
Erik Trinkaus | Newswise Science News
Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY
NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences