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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
general
Earliest evidence of modern human life history in North African early Homo sapiens
Proceedings of the National Academy of Sciences of the United States of America, Volume 104, No. 15, Year 2007
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Description
Recent developmental studies demonstrate that early fossil hominins possessed shorter growth periods than living humans, implying disparate life histories. Analyses of incremental features in teeth provide an accurate means of assessing the age at death of developing dentitions, facilitating direct comparisons with fossil and modern humans. It is currently unknown when and where the prolonged modern human developmental condition originated. Here, an application of x-ray synchrotron microtomography reveals that an early Homo sapiens juvenile from Morocco dated at 160,000 years before present displays an equivalent degree of tooth development to modern European children at the same age. Crown formation times in the juvenile's macrodont dentition are higher than modern human mean values, whereas root development is accelerated relative to modern humans but is less than living apes and some fossil hominins. The juvenile from Jebel Irhoud is currently the oldest-known member of Homo with a developmental pattern (degree of eruption, developmental stage, and crown formation time) that is more similar to modern H. sapiens than to earlier members of Homo. This study also underscores the continuing importance of North Africa for understanding the origins of human anatomical and behavioral modernity. Corresponding biological and cultural changes may have appeared relatively late in the course of human evolution. © 2007 by The National Academy of Sciences of the USA.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC1828706/bin/pnas_0700747104_index.html
https://efashare.b-cdn.net/share/pmc/articles/PMC1828706/bin/pnas_0700747104_1.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC1828706/bin/pnas_0700747104_2.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC1828706/bin/pnas_0700747104_3.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC1828706/bin/pnas_0700747104_4.pdf
Authors & Co-Authors
Smith, Tanya M.
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Tafforeau, Paul
France, Poitiers
Universite de Poitiers
France, Grenoble
European Synchrotron Radiation Facility
Reid, Donald J.
United Kingdom, Newcastle
University of Newcastle Upon Tyne, Faculty of Medical Sciences
Grün, Rainer
Australia, Canberra
The Australian National University
Eggins, Stephen M.
Australia, Canberra
The Australian National University
Boutakiout, Mohamed
Morocco, Rabat
Faculté Des Sciences Rabat
Hublin, Jean Jacques
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Statistics
Citations: 307
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1073/pnas.0700747104
ISSN:
00278424
Research Areas
Maternal And Child Health
Study Locations
Multi-countries
Morocco