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Neo-taphonomic studies have allowed us to detect bone damage patterns linked to carnivore preferences and behavioral traits as well as to improve our understanding of the origin of different alterations on vertebrate fossil faunas. However, taphonomically speaking vultures are among the least studied of all common, obligate scavengers. The research reported here contributes to characterise Eurasian griffon vulture (Gyps fulvus) behavior from a taphonomic perspective describing bone damage on 12 small-sized ungulate carcasses. The combination of observational data from photo/video-trap together with taphonomic analyses allowed us to manage factors like feeding behavior or time of consumption, as well as to accurately record bone modified items. Some bone-modifying effects are described here for the first time as vulture-made bone-damage distinctiveness. Still, some others may pose equifinality problems especially regarding small carnivores. This taphonomic conundrum leaves an interpretation problem particularly in archaeological sites in which those agents are present and consequently, an individualization dilemma about the taphonomic actors involved in bone modified assemblages. This research was funded by a research support contract within the RYC2019-026386-I project from the Spanish Ministry of Science and Innovation (MICINN) led by RB. JR, RB and MA develop their research studies within the Spanish Ministry of Science and Innovation project PID2022-138590NB-C41 and the Generalitat de Catalunya-AGAUR projects CLT009/22/000045 and 2021 SGR 01238. RB is supported by a Ramón y Cajal (RyC) research contract from the Spanish Ministry of Science and Innovation (RYC2019-026386-I). AS acknowledges the Agencia Estatal de Investigación (AEI) for supporting the project PID2020-114646RB-C43. Funded by the European Union (ERC, SCAVENGERS, 101097511). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. The Institut català de Paleoecologia Humana i Evolució Social (IPHES-CERCA) has received financial support from the Spanish Ministry of Science and Innovation through the ‘María de Maeztu’ program for Units of Excellence (CEX2019-000945-M). With funding from the Spanish government through the ‘María de Maeztu Unit of Excelence’ accreditation (CEX2019-000945-M). Peer reviewed

The settlement of cold and arid environments by Pleistocene hunter-gatherers has been a heated topic in Paleolithic Archaeology and the Quaternary Sciences for years. In the Iberian Peninsula, a key area for studying human adaptations to such environments is composed by the large interior and upland regions of the northern and southern plateaus (Mesetas) and bordering areas. As, traditionally, these regions have been relatively under-investigated compared to the ecologically more favored coastal areas of the peninsula, our knowledge of the human settlement of the whole Iberian hinterland remains scarce for the Last Glacial. In this paper we present the discovery and first geoarcheological, paleoenvironmental and chronometric evidence obtained at Charco Verde II, a new site close to the southwestern foothills of the Iberian system range (Guadalajara province, Spain), bearing a sequence of Magdalenian human occupations starting at least at 20.8–21.4 ka cal BP during the Last Glacial Maximum, and covering Greenland Stadial 2 until ∼15.1–16.6 ka cal BP, including Heinrich stadial 1. As this site is located in an upland region which today faces one of the harshest climates in Iberia, such occupation sequence, occurred during some of the coldest and most arid phases of the Last Glacial, has relevant implications for our understanding of human-environment-climate interactions and population dynamics in Iberia and Western Europe. These findings support the hypothesis that the Iberian hinterland was not avoided by Upper Paleolithic hunter-gatherers due to ecological constraints, but it hosted a complex and relatively dense settlement at least in some areas, even during cold periods. This suggest, one more time, that the historical scarcity of Upper Paleolithic sites in inland Iberia is, to a significant extent, an artifact of research bias. © 2023 Aragoncillo-del Rı´o et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This research has been funded by the European Research Council (ERC) (https://erc. europa.eu/homepage) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 805478; MULTIPALEOIBERIA project: https://multipaleoiberia.com/ Peer reviewed

CO2 storage in carbonate aquifers is a way to mitigate atmospheric CO2 emissions, but it leads to acid-producing reactions that may induce alterations in the rock pore structure and hydromechanical properties. To gain a better understanding of these changes in rock properties, percolation experiments under constant flow-rate conditions with (i) CO2-saturated water (PCO2 = 100 bar and T = 60 °C) and (ii) HCl solutions (P = 1 bar and T = 60 °C) were performed on centimetric cores of the grain-supported Pont du Gard Limestone (permeability about 10−14–10−13 m2). Effluent chemistry analyses, X-ray imaging, and measurements of the hydromechanical properties of intact and altered specimens were used to quantify acid-induced changes in the two acid-rock systems. Experimental results show that the rock dissolution patterns highly depend on the acid type and pore space heterogeneity. Under the flow conditions of these experiments, complete HCl dissociation (strong acid) and rapid HCl-rock reaction result in a compact dissolution pattern that only affects the hydromechanical properties of the core inlet. Conversely, partial dissociation of H2CO3 (weak acid) produces chemical reactions all along the core. Initial structural heterogeneities localize chemical reactions along preferential flow pathways, causing instabilities in the reaction front and wormhole formation, which markedly enhances permeability. A powerlaw relationship with a very large exponent (as high as 24) accounts for the variation in permeability as a function of porosity. Altered cores render both a significant attenuation in mechanical rock properties and ultrasonic velocities, which is reproduced using a Differential Effective Medium (DEM) homogenization approach. The high-pressure percolation experiments of this study using CO2-saturated water represent an extreme scenario of CO2-brine-rock interactions in carbonate reservoirs, which needs to be considered to improve the prediction and monitoring of the storage performance. This work has received funding from the European Union's Horizon 2020 Research and Innovation Programme 2014-2018 under agreement No. 847593, specifically from the WP MAGIC. A.V. acknowledges funding from the University of Barcelona under Travel grants for Ph.D. students in Earth Sciences 2020. V.V. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Program through the Starting Grant GEoREST (www.georest.eu) (Grant agreement No. 801809). J.C. and J.M.S. also acknowledge funding from the Catalan Government through project 2017SGR1733. IDAEA-CSIC is a Centre of Excellence Severo Ochoa (Spanish Ministry of Science and Innovation, Project CEX2018-000794-S funded by MCIN/AEI/10.13039/501100011033). IMEDEA is an accredited “Maria de Maeztu Excellence Unit” (Grant CEX2021-001198, funded by MCIN/AEI/10.13039/501100011033). Thanks are due to Jordi Bellés (IDAEA-CSIC), Laurent Schoumacker (GeoResources Laboratory) and Christophe Morlot (GeoResources Laboratory) for their help in conducting the percolation experiments, MICP and uniaxial compression tests, and XMCT imaging, respectively. The authors would also like to thank the thoughtful reviews by anonymous reviewers, which helped improve the quality of the article. Peer reviewed

The development of new alternatives for the protection of metallic heritage aims to improve the performance of the coatings used in recent decades. For this purpose, the performance of three novel or poorly explored coatings in this field of study has been evaluated: Owatrol Oil, TiO-modified Paraloid B-72 and a hybrid of poly(2-ethyl-2-oxazoline), PEOX and poly(4-hydroxy styrene), PHS as a self-healing coating. These have been compared with coatings widely used in conservation such as: Paraloid B-72, Incralac and microcrystalline wax C80. The coatings were evaluated after accelerated ageing in terms of aesthetic changes (visual observation under stereomicroscope and colour measurements), protective ability (electrochemical impedance spectroscopy) and chemical stability (FTIR). After 500 h of exposure to Xenon-arc lamp, it was observed how the addition of TiO to Paraloid B-72 partially reduces photo-oxidation of the polymer, but at the same time harms the protective ability due to the appearance of defects. The self-healing coating is quite stable and can also regenerates superficial scratches of about 100 µm if subjected to 90% RH. On the other side, Owatrol demonstrated a very poor performance. These advantages and disadvantages in their use have been compared with those of B-72, Incralac and C80 microcrystalline wax, identifying in which cases their application for protection on scientific-technical artefacts may be feasible. This work has been funded by MCIN/AEI/10.13039/501100011033 and “ERDF A way of making Europe”, under the project COMPACT (HAR2017-89911-R) and the predoctoral grant PRE2018-086667 additionally funded by “ESF Investing in your future”. It has also been funded by the Community of Madrid and the European Social Fund, under the TOP Heritage-CM programme (P2018/NMT-4372).

In recent decades, archaeological and written records have been used in combination to improve our understanding of Late Antique and Early Medieval Hispanic architectural culture (5th–10th c.). Within this renewed research context, the rebuilding of Late Antique churches and the reuse of earlier materials in both Early Medieval Christian and Islamic religious buildings; the transformation of Late Antique churches into early Islamic mosques in al-Andalus; and the rebuilding of other churches by the Christians themselves, both in al-Andalus and in the northern Iberian plateau, from the late 8th century onwards, have often been used to thread narratives concerning tradition, continuity, and re-sacralisation of earlier religious architectural spaces and, through this, religious change in the middle ages. However, the application of modern archaeological methodology reveals that these processes need to be qualified, for the stratigraphic gaps between building phases make them sometimes hard to interpret. By analysing some examples of Hispanic religious sites, this paper reflects on the many concepts related to sacralisation, explains the way archaeology is able to trace the sacralisation processes, and intends thus to highlight the complexity of these phenomena.

The Canary Islands were initially colonized around 200 CE by North African Berber populations who brought with them domestic plants and animals. These communities remained isolated until the arrival of Europeans in the Late Middle Ages which triggered the conquest of the archipelago. Its geostrategic location in the framework of Atlantic expansion facilitated the arrival of people, knowledge, goods, plants, and animals which served to shape the new Canarian society. This study explores the dietary practices of this period through the zooarchaeological analysis of the faunal remains recovered at the Hospital de San Martín (fifteenth to the eighteenth centuries), Las Palmas (Gran Canaria, Spain). Our results suggest that caprines were the main taxa consumed. This follows both the pre-colonial Indigenous tradition and, according to historical sources, the subsequent European period. The faunal assemblage recovered also reveals the first directly radiocarbon-dated cases in the Canary Islands of three hitherto unknown species: cattle, chicken, and rabbit. Moreover, the results evidence a progressive increase throughout the Modern Era of chicken and rabbit, and that translocating these new species to the archipelago during the European expansion led to a diversification of meat resources. Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This research was supported by the RTI2018-101923-J-I00, PID2020-117496GB-I00 and RYC2019-028346 projects (Ministerio de Ciencia e Innovación, Spain) and the ERC Starting Grant project IsoCAN (grant 851733, European Commission). The first author was supported by a PhD scholarship of the Agencia Canaria de Investigación, Innovación y Sociedad de la Información (ACIIS) (European Social Fund and the Consejería de Economía, Industria, Comercio y Conocimiento of the Government of the Canary Islands) This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made Peer reviewed

Ceramic technology makes an abrupt appearance in the New World Arctic at circa 2800 cal BP. While there is general consensus that the ultimate source of these Alaskan pottery traditions lay in continental NE Asia, the motivations for the adoption of pottery in Alaska have remained unclear. Through organic residue analysis we investigated the function of Norton pottery in Southwest Alaska, and the extent to which its function changed in later periods under the increasing northern influence of Thule culture in the region (from ca. 1000 cal BP). Our results show clear evidence of aquatic resource processing in all pottery vessels. Regional variability due to environmental and ecological differences are apparent in the pottery. The majority of Norton pottery was from inland riverine locations and the function of this early pottery was to process anadromous fish, with only limited evidence of other resources. After 1000 cal BP more sites appear on the coast, and while pottery technology changes dramatically at this time, this is not as clear in pottery function which remains aimed at local abundant aquatic resources. We hypothesize that pottery was adopted into Alaska as part of a riverine adaptation and suggest that targeted human exploitation of large riverine systems may have facilitated its expansion into Southwest Alaska. Furthermore, we suggest that this pattern might extend back into Siberia where Alaskan pottery originates. This work was supported by the University of Groningen, Faculty of Arts, the Arts and Humanities Research Council ( AH/L0069×/1 ), and the European Research Council ( ERC-2015-AdG No 695539 ).