ORCID Profile
0000-0001-5853-5014
Current Organisations
Institut Catala de Paleoecologia Humana i Evolucio Social
,
Centro de Evolución y Comportamiento Humanos (UCM-ISCIII)
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Publisher: American Association for the Advancement of Science (AAAS)
Date: 26-01-2018
Abstract: Recent paleoanthropological studies have suggested that modern humans migrated from Africa as early as the beginning of the Late Pleistocene, 120,000 years ago. Hershkovitz et al. now suggest that early modern humans were already present outside of Africa more than 55,000 years earlier (see the Perspective by Stringer and Galway-Witham). During excavations of sediments at Mount Carmel, Israel, they found a fossil of a mouth part, a left hemimaxilla, with almost complete dentition. The sediments contain a series of well-defined hearths and a rich stone-based industry, as well as abundant animal remains. Analysis of the human remains, and dating of the site and the fossil itself, indicate a likely age of at least 177,000 years for the fossil—making it the oldest member of the Homo sapiens clade found outside Africa. Science , this issue p. 456 see also p. 389
Publisher: Elsevier BV
Date: 08-2018
Publisher: Wiley
Date: 07-02-2017
DOI: 10.1002/AJPA.23180
Abstract: Fossil human teeth are nowadays systematically CT-scanned by palaeoanthropologists prior to any further analysis. It has been recently demonstrated that this noninvasive technique has, in most cases, virtually no influence on ancient DNA preservation. However, it may have nevertheless an impact on other techniques, like Electron Spin Resonance (ESR) dating, by artificially ageing the apparent age of the s le. To evaluate this impact, we µCT-scanned several modern enamel fragments following the standard analytical procedures employed by the Dental Anthropology Group at CENIEH, Spain, and then performed ESR dose reconstruction for each of them. The results of our experiment demonstrate that the systematic high-resolution µCT-scanning of fossil hominin remains introduces a nonnegligible X-ray dose into the tooth enamel, equivalent to 15-30 Gy depending on the parameters used. This dose may be multiplied by a factor of ∼8 if no metallic filter is used. However, this dose estimate cannot be universally extrapolated to any µCT-scan experiment but has instead to be specifically assessed for each device and set of parameters employed. The impact on the ESR age results is directly dependent on the magnitude of the geological dose measured in fossil enamel but could potentially lead to an age overestimation up to 40% in case of Late Pleistocene s les, if not taken into consideration.
Publisher: Springer Science and Business Media LLC
Date: 05-05-2021
DOI: 10.1038/S41586-021-03457-8
Abstract: The origin and evolution of hominin mortuary practices are topics of intense interest and debate
Location: Spain
Location: Spain
Location: Spain
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Laura Martín-Francés Martín de la Fuente.