La cifra de desaparecidos en Argentina motiva debates recurrentes. Durante la última dictadura militar (1976–1983) sus denunciantes elaboraron diversas cifras y estimaciones pero el número de 30 mil desaparecidos adquirió un carácter canónico. Tras retornar la democracia, la Comisión Nacional sobre la Desaparición de Personas registró 8.960 casos. En los años noventa, en un contexto de impunidad, grupos de la sociedad civil elaboraron sus propias cifras y en los dos mil el Estado ofreció nuevos registros. El resurgimiento del negacionismo y la relativización del crimen revitalizaron este debate. Este trabajo historiza las cifras de desaparecidos y víctimas de desaparición forzada elaboradas por diversos actores y propone una aproximación académica sobre el tema. Comprende a estas cifras en su doble dimensión: como fruto de la elaboración de conocimiento sobre las desapariciones y como expresión de los combates por la memoria sobre las violaciones a los derechos humanos sucedidas en el país.

This essay reviews the following works:

Collision of Worlds: A Deep History of the Fall of Aztec Mexico and the Forging of New Spain. By David M. Carballo. Oxford: Oxford University Press, 2020. Pp. xvi + 351. $37.99 hardcover, $23.99 paperback, e-book. ISBN: 9780197661451.

Conquistadores: A New History of Spanish Discovery and Conquest. By Fernando Cervantes. New York: Viking, 2021. Pp. vxiii + 496. $35.00 hardcover, e-book. ISBN: 9781101981269.

Inca Apocalypse: The Spanish Conquest and the Transformation of the Andean World. By R. Alan Covey. Oxford: Oxford University Press, 2020. Pp. xix + 592. $34.95 hardcover. ISBN: 9780190299125.

Death in the Snow: Pedro de Alvarado and the Illusive Conquest of Peru. By George W. Lovell. Montreal: McGill-Queen’s University Press, 2022. Pp. xv + 280. $39.95 hardcover. ISBN: 9780228014409.

Strike Fear in the Land: Pedro de Alvarado and the Conquest of Guatemala, 1520–1541. By W. George Lovell, Christopher H. Lutz, and Wendy Kramer. Norman: University of Oklahoma Press, 2020. Pp. xvi + 194. $32.95 hardcover, $21.95 paperback, e-book. ISBN: 9780806190044.

German Conquistadors in Venezuela: The Welsers’ Colony, Racialized Capitalism, and Cultural Memory. By Giovanna Montenegro. Notre Dame, IN: University of Notre Dame Press, 2022. Pp. xvii + 372. $95.00 hardcover, $75.99 e-book. ISBN: 9780268203214.

Seven Myths of the Spanish Conquest. By Matthew Restall. Updated edition. Oxford: Oxford University Press, 2021. Pp. xix + 272. $21.99 paperback. ISBN: 9780197537299.

Conquistadors and Aztecs: A History of the Fall of Tenochtitlan. By Stefan Rinke. Oxford: Oxford University Press, 2023. Pp. ix + 328. $34.95 hardcover. ISBN: 9780197552469.

Mining operations in the Enmynveem valley, northeastern Siberia, exposed a well-preserved right hind leg of Mammuthus primigenius (woolly mammoth), dated to ca. 37,500 cal yr BP. The leg had a fracture that crosscut the midsections of the tibia and fibula. Additional skeletal and soft tissue remains, including two mummified adults (Berezovka, ca. 47,200 cal yr BP; Bolshoi Lyakhovsky, ca. 37,000 cal yr BP), document the presence of mammoths in interior mountain valleys and across both northern and southern coasts of far northeastern Siberia during Marine Isotope Stage (MIS) 3. A mosaic of herb-dominated tundra communities characterized the vegetation of the Enmynveem site during late to middle MIS 3 and MIS 2 (ca. 37,000–17,000 cal yr BP). Shrubs were limited to Salix during the late Pleistocene, whereas Betula also may have been present in sheltered sites during MIS 3. Herb communities remained dominant during the late Pleistocene–Early Holocene transition, although shrub Betula increased during this interval. By ca. 10,200 cal yr BP, the vegetation was Betula–Alnus shrub tundra. Larix and Pinus pumila were established in the valley by ca. 8700 cal yr BP and ca. 5700 cal yr BP, respectively.

Recent research has shown the potential of speleothem δ13C to record a range of environmental processes. Here, we report on 230Th-dated stalagmite δ13C records for southwest Sulawesi, Indonesia, over the last 40,000 yr to investigate the relationship between tropical vegetation productivity and atmospheric methane concentrations. We demonstrate that the Sulawesi stalagmite δ13C record is driven by changes in vegetation productivity and soil respiration and explore the link between soil respiration and tropical methane emissions using HadCM3 and the Sheffield Dynamic Global Vegetation Model. The model indicates that changes in soil respiration are primarily driven by changes in temperature and CO2, in line with our interpretation of stalagmite δ13C. In turn, modelled methane emissions are driven by soil respiration, providing a mechanism that links methane to stalagmite δ13C. This relationship is particularly strong during the last glaciation, indicating a key role for the tropics in controlling atmospheric methane when emissions from high-latitude boreal wetlands were suppressed. With further investigation, the link between δ13C in stalagmites and tropical methane could provide a low-latitude proxy complementary to polar ice core records to improve our understanding of the glacial–interglacial methane budget.

This research was carried out in north-central Poland, which was occupied by the ice sheet of the Saalian (Marine Isotope Stage [MIS] 6) and Upper Stadial of the Weichselian (MIS 2) glaciation. The application of the anisotropy of magnetic susceptibility (AMS) method supported by a digital elevation model (DEM) analysis of the orientation of glacial landforms allowed for the reconstruction of ice-sheet extent and ice movement directions of these two Pleistocene glaciations. The research used an innovative method of collecting AMS till samples from the glacial plateau areas. Based on the research, it was found that during the general recession of the ice sheet of the Saalian glaciation, a previously undescribed glacial transgression occurred, characterized by a different direction of ice-sheet movement. On the basis of detailed geomorphological studies of the area of terminal moraines, previously described in fragments, the maximum extent of the ice sheet during the Weichselian glaciation was clarified. The recession of the ice sheet of the Weichselian glaciation from the area of north-central Poland took place in four regressive or transgressive–regressive stages with variable directions of ice-sheet movement. The results obtained indicate the great potential of the AMS method in paleoenvironmental studies of glaciated areas.

In the Basilicata region, located in southern Italy and known for hosting among the first occurrences of the Acheulean culture in southwestern Europe, the Lower Paleolithic site of Loreto at Venosa is located less than a kilometer from the emblematic site of Notarchirico and less than 25 km from Cimitero di Atella. The Loreto site has not been studied as thoroughly as the two other sites and, although geological investigations have been carried out in the Venosa basin, no direct numerical dating has ever been published for the three archaeological levels brought to light during the excavation campaigns. We present a multi-method geochronological approach combining ESR/U-series, ESR, and 40Ar/39Ar permitting to refine the age of the most ancient archaeological level (A) of the Loreto site. These data allow us to propose an MIS 13 age for this level, in accordance with previous hypotheses based on geological and paleontological data. We also propose a technical review of the lithic tools preserved in the collection of the National Archaeological Museum of Venosa to integrate Loreto in the evolution scheme of the European Acheulean techno-complex emergence and diffusion.

Lamalunga Cave (Altamura, Southern Italy) is renowned for the discovery in 1993 of an excellently preserved Neanderthal skeleton. Given the importance of the findings and the potential use of Lamalunga speleothems for paleoclimate reconstructions, a detailed monitoring program was undertaken to investigate the connections between microclimate parameters and speleothem growth. The cave air temperature is characterized by annual sinusoidal cycles with increasing phase shift and decreasing thermal amplitude from ± 2.1°C to ± 0.04°C as a function of increasing rock overburden, and daily to sub-daily cycles induced by surface air pressure (SAP) variations characterized by strong 24-hour and 12-hour solar harmonic frequencies, with thermal amplitude decreasing from 0.0054°C to 0.0021°C in the deeper parts of the cave. The ventilation regime is mainly controlled by SAP fluctuations. Fast SAP rises can trigger “emptying events” during which most of the cave air is replaced and the CO2 concentration falls towards near-atmospheric values. The steady and gentle ventilation created by SAP fluctuations also influences the growth and morphology of calcite coralloids, with larger popcorn assemblages concentrated in the northern galleries and delicate branching morphologies prevailing along the South Gallery where stable temperature and relative humidity conditions occur. The study is a seminal example of how high-precision measurements of cave air temperature can provide a wealth of information on cave ventilation and thermal regime and provide valuable support for robust paleoclimate reconstruction from speleothems.

Predicting coastal change depends upon our knowledge of postglacial relative sea-level variability, partly controlled by glacio-isostatic responses to ice-sheet melting. Here, we reconstruct the postglacial relative sea-level changes along the Caribbean and Pacific coasts of northwestern South America by numerically solving the sea-level equation with two scenarios of mantle viscosity: global standard average and high viscosity. Our results with the standard model (applicable to the Pacific coast) agree with earlier studies by indicating a mid-Northgrippian high stand of ~2 m. The high-viscosity simulation (relevant to the Caribbean coast) shows that the transition from far- to intermediate-field influence of the Laurentide Ice Sheet occurs between Manzanillo del Mar and the Gulf of Morrosquillo. South of this location, the Colombian Caribbean coast has exhibited a still stand with a nearly constant Holocene relative sea level. By analyzing our simulations considering sea-level indicators, we argue that tectonics is more prominent than previously assumed, especially along the Caribbean coast. This influence prevents a simplified view of regional relative sea-level changes on the northwestern South American coast.

The depositional history of the Bonneville Salt Flats, a perennial saline pan in Utah's Bonneville basin, has poor temporal constraints, and the climatic and geomorphic conditions that led to saline pan formation there are poorly understood. We explore the late Pleistocene to Holocene depositional record of Bonneville Salt Flats cores. Our data challenge the assumption that the saline pan formed from the desiccation of Lake Bonneville, the largest late Pleistocene lake in the Great Basin, which covered this area from 30 to 13 cal ka BP. We test two hypotheses: whether climatic transitions from (1) wet to arid or (2) arid to wet led to saline pan deposition. We describe the depositional record with radiocarbon dating, sedimentological structures, mineralogy, diatom, ostracode, and portable X-ray fluorescence spectrometer measurements. Gypsum and carbonate strontium isotope ratio measurements reflect changes in water sources. Three shallow saline lake to desiccation cycles occurred from >45 and >28 cal ka BP. Deflation removed Lake Bonneville sediments between 13 and 8.3 cal ka BP. Gypsum deposition spanned 8.3 to 5.4 cal ka BP, while the oldest halite interval formed from 5.4 to 3.5 cal ka BP during a wetter period. These findings offer valuable insights for sedimentologists, archaeologists, geomorphologists, and land managers.

The Holocene is a critical period for understanding the East Asian monsoon system (EAM) over long timescales, but high-precision dating and high-resolution records from the Holocene epoch at monsoonal margins of East Asia are lacking. Here, on the basis of closely spaced radiocarbon and optically stimulated luminescence dating results obtained from a typical loess–paleosol sequence on the northern Chinese Loess Plateau (CLP), we provide an independent age-based, high-resolution depositional record of East Asian summer (EASM) and winter monsoons (EAWM) variations over the past ~14 ka. We find that both the EASM and EAWM simultaneously strengthened sometime during the Holocene optimum (~7–5 ka BP), with greater seasonality, and weakened during the Late Holocene. These findings are counterintuitive to our understanding of the EAM variations based on loess records at suborbital scales during interglacial periods, providing an alternative scenario of the monsoon system evolution. We postulate that high-latitude forcing and surface feedbacks, such as vegetation change, have modulated the EAM variations during the Holocene warmth.

This article critically examines reasons for the persistent use of states of emergency (SOEs) as a tool of crime control in Jamaica and risks associated with normalising these measures in small, low-capacity, competitive democracies in Latin America and the Caribbean (LAC). We attend to the question of permanent SOEs as an issue of law and certain policing methods becoming normalised. This differs from scholars who think about the use of permanent SOEs as suspension of law or executive rule and make a clear distinction between law and violence and normalcy and emergency. Our findings show that persistent usage of SOEs in Jamaica reflects the incapacity of the state to control violent crime as well as its effort to strengthen its coercive capabilities and compensate for the ineffectiveness of the police. It is also a response to public demand for SOE policing. State strengthening is a necessary condition for a more peaceful and law-abiding society but is also a carrier of risks of democratic degeneration via rights-disregarding policing. Nonetheless, we have seen authoritarian management of crime without descent into authoritarianism, in general, and strong boundary-marking and patrolling by some state-oversight institutions that enjoy the support of civil society.

Across Latin America, there continues to be strong resistance to the claim that racism plays a role in the production of urban space. Deemed antipatriotic, this issue remains widely unaddressed in urban planning and geography. Based on qualitative research in Bogotá and secondary literature on other Latin American cities, this article explores the afterlife of mestizaje (racial mixture) as a racial–colonial project from the viewpoint of its materialisation in the city and society–space relations. In particular, it illustrates how racism in the city is transfigured as ‘always something else’ (e.g., culture, class, regionalism, displacement) through a variety of normative, discursive and operational devices. Thus, the article confronts the need to divest from the racial hegemony of mestizaje in urban planning and geography, suggesting that it is hindering the path towards more equitable urban futures.