The impact of microbiologically influenced corrosion on underwater archaeological sites has spurred recent advancements in research examining the link between microorganisms and historic preservation. Although the microbiomes of steel shipwreck sites have been the subject of DNA sequencing studies and other interdisciplinary investigations, aluminum submerged aircraft wrecks, a prominent symbol of World War II, have yet to be the focus of similar research. This article represents the initial attempt to fill this void by describing a biofilm collection method used to obtain samples for DNA sequencing from World War II aircraft sites off Hawaii. Rather than relying on proxies for microbial growth on wrecks or on destructive sampling, the focus is on a methodology that is productive but minimally intrusive. The protocols resulted in the successful collection of in situ biofilm samples from four submerged aircraft wrecks. The methodology was found to be affordable, time efficient, and reproducible, thus feasible for archaeological site management. The development of viable in situ collection methods for biofilm should aid efforts to empirically assess the relevancy of microbiologically influenced corrosion to submerged aircraft while enabling longitudinal studies of microorganisms that potentially affect site preservation.

Community Coastal Zone Assessment Surveys (CCZASs) conducted on the Scottish coast aim to characterize and assess the significance, condition, and vulnerability of coastal archaeology and to prioritize assets most at risk. Two key differences from earlier coastal zone assessment survey methods are the use of coastline vulnerability models to target fieldwork and the involvement of the public in the surveys. This article details the methodology used to plan for, carry out, and disseminate results of the surveys, including the following: evaluating and targeting coastlines in a GIS framework to focus new coastal surveys in areas most susceptible to erosion, using SCAPE's coastal archaeology recording mobile application as our survey tool, managing data through SCAPE's Sites at Risk portal, involving local volunteers, and disseminating findings and data flow into regional and national historic environment databases. We discuss results and reflections from surveys of the Highland, Moray, and Aberdeenshire coastlines conducted in 2022 and conclude with general principles applicable beyond Scotland.

Adopting a human rights-based approach, this paper scrutinizes the treatment of illicit trafficking in cultural property as a human rights issue. The study focuses on the Iraqi contribution to the international agenda, revealing that Iraq co-sponsored at least 13 UN resolutions on the restitution of illegally expropriated cultural property, actively contributing to the negotiation of others, along with submitting its legal opinions on the drafts of relevant international documents, starting from as early as 1936 to culminate with the calls to stop cultural plunder feeding Western markets since the 1990s. Centering the Iraqi voices and adopting a critical decolonial rights-based perspective, the study showcases how illicit trade in cultural property clearly emerges as a violation of a state’s permanent sovereignty over its wealth and resources, negatively impacting its ability to guarantee the right to pursue economic, social, and cultural development for its people, as well as to freely dispose of their resources, the key components of the right to self-determination.

Loess–paleosol outcrops were logged and dated to trace loess cover during the Pleistocene in a low-elevation mountainous area. The exposed successions were a maximum of 15 m thick and stratigraphically fragmentary. Still, results suggest that loess was deposited in all climatically suitable periods within the limits of the dating methods (ca. 400 ka), and probably also beyond this. Luminescence measurements provided numerical ages from ca. 18 ka to ca. 200 ka and minimum ages of up to >267 ka. Loess accumulation was also active during the relatively mild MIS 3. A new occurrence of a well-preserved Quaternary tephra was documented, correlative with the middle Pleistocene Bag Tephra (ca. 340 or 368 ka). The dating of loess successions provided valuable data on geomorphic evolution as well, identifying hydrological changes and constraining a maximum incision and uplift rate of 0.008–0.035 mm/yr for the western part of the area. The low thickness of loess–paleosol successions and the stratigraphic gaps seem to be a consequence of repeated erosion during the Pleistocene rather than a result of non-deposition. The mountains probably have been covered with loess for most of the time during the past 1 Ma. This should be taken into consideration in studies influenced by the loess cover of an area.

Superadas las crisis sociales y políticas que tuvieron lugar en las décadas finales del período Preclásico, nuevas entidades comienzan a emerger en el panorama geopolítico de las tierras bajas mayas. En el caso del Petén campechano, el descubrimiento de sitios arqueológicos con vestigios de estructuras defensivas y monumentos pétreos permite inferir la configuración de una nueva realidad en la que entidades como Oxpemul parecen comenzar a despuntar. En este sitio destacan dos monumentos que preservan registro iconográfico de cautivos, las Estelas 22 y 23; estas exhiben patrones iconográficos típicos del Clásico temprano, entre los que destacan tres figuras desnudas e hincadas. Con la toma de nuevas fotografías diurnas y nocturnas de las estelas y la utilización de la herramienta computacional Reflectance Transformation Imaging, se presentan nuevas interpretaciones de los monumentos de Oxpemul; además, a través de los nuevos análisis iconográficos se proponen nuevas consideraciones sobre las dinámicas sociopolíticas regionales durante los contextos tempranos en los que Oxpemul parece jugar un papel destacable.

We synthesized pre-last glacial maximum pollen records to reconstruct North American pollen diversity since ca. 130 ka. Using taxonomic diversity (a measure of the number and abundance of taxa) and functional diversity (a measure of the number and abundance of different phenotypes) we identified temporal and spatial diversity trends for six North American bioregions: Arctic, Intermountain West, Mexico, Pacific Northwest, Southeast, and Yucatán. Reconstructed taxonomic temporal and spatial trends vary among bioregions, with regional diversity patterns captured in the functional metric, suggesting shifts in species composition coincide with shifts in ecosystem function. However, significant shifts in taxonomic pollen diversity differed in frequency, magnitude, and timing from their functional counterparts. Variations in both regional taxonomic and functional diversity response to global and regional temperature trends were evident, suggesting temperature alone does not fully explain changes in species composition. Regional richness estimates exhibited higher stability relative to the weighted diversity estimates indicating low levels of species turnover through Late Quaternary warming–cooling phases. Shifts in regional diversity did not predictably respond to stadial and interstadial transitions. Instead, North American patterns of plant diversity over the last ca. 130 ka differ geographically, likely responding to regional rather than global climate change.

The paleopedology of the world’s largest retrogressive thaw slump, Batagay, is understudied. Micromorphological and geochemical analysis reveal the properties of th host sediments and major pedogenic features. Epigenetic soil profiles of Marine Oxygen Isotope Stage (MIS) 7 (or older) and 5e are clearly distinguished and well developed due to favorable bioclimatic conditions for pedogenesis, probably similar to modern ones. The oldest unit contains a paleosol similar to a Histic Reductaquic Cryosol, indicating a peat-covered, boggy environment. The MIS 5e unit contains organic-rich Histic Spodic Cryosol with well-developed structure, formed during the interglacial optimum, which was relatively warm and presumably resembled modern bioclimatic conditions. MIS 4–3 deposits contains soil-like bodies enriched in coarse organogenic material resembling incipient Histic Reductaquic Cryosols. Interglacial/interstadial units contain micromorphological evidence of aggregate and pore formation, Fe-oxide and organic matter redistribution and clay accumulation. Stadial deposits show weakly expressed soil structure with uneven aggregates, cryogenic disintegration of plant detritus and rare evidence of accumulation of humic substances. Major elemental ratios indicate intensification of biochemical weathering in paleosols and soil-like bodies. Pedogenically reworked material of stadial sedimentary units with sporadic and incipient soil-like bodies provide a significant source for paleoenvironmental reconstruction of harsh Late Pleistocene environments.

Marine plastic pollution is an issue that threatens most places around the world, including the remote and unique Galapagos archipelago. We used the archaeological framework of object itineraries as part of a story-writing workshop to explore perceptions of marine plastic litter (MPL) by students from two schools in Puerto Ayora, Santa Cruz. Their stories, adopting an archaeological approach to plastic litter as artefacts, told the itinerary of MPL collected on Galapagos shores. We also analysed surveys evaluating their self-reported knowledge, pro-environmental behaviours (PEBs) and perceptions of the issue of MPL before and after the workshop. Our findings showed good awareness of MPL origins and impacts, reflecting the specific pathways of litter reaching this Pacific archipelago from mainland South America, regional marine activities including fishing in and around the Galapagos Marine Reserve, and local sources, although those are thought to be limited. Yet the lack of focus on solutions in the stories and the emphasis on recycling PEBs suggest more targeted activities are needed to address the need of complementary solutions and to place more emphasis on reducing plastic use.

Earlier objects are frequently identified in later contexts, though rarely form the focus of discussion. This paper presents 34 sites where earlier Bronze Age metalwork has been found in later Bronze Age contexts in southern Britain, including hoards and non-hoard contexts. These ‘out-of-time’ objects follow complex trajectories and can inform us about the potential ways past societies conceived their own pasts, especially when contextualized in broader integrated landscapes. Out-of-time objects might be deposited singly or within hoards to reinforce community boundaries and legitimize links with past communities. The form, wear and treatment of these objects pre-deposition (e.g. curation and/or deformation) as well as the places in which they were buried represent indicators of prehistoric processes of commemoration and/or forgetting.