The influence of pareidolia has often been anecdotally observed in examples of Upper Palaeolithic cave art, where topographic features of cave walls were incorporated into images. As part of a wider investigation into the visual psychology of the earliest known art, we explored three hypotheses relating to pareidolia in cases of Late Upper Palaeolithic art in Las Monedas and La Pasiega Caves (Cantabria, Spain). Deploying current research methods from visual psychology, our results support the notion that topography of cave walls played a strong role in the placement of figurative images—indicative of pareidolia influencing art making—although played a lesser role in determining whether the resulting images were relatively simple or complex. Our results also suggested that lighting conditions played little or no role in determining the form or placement of images, contrary to what has been previously assumed. We hypothesize that three ways of artist–cave interaction (‘conversations’) were at work in our sample caves and suggest a developmental scheme for these. We propose that these ‘conversations’ with caves and their surfaces may have broader implications for how we conceive of the emergence and development of art in the Palaeolithic.

In at least 400 European caves such as Lascaux, Chauvet and Altamira, Upper Palaeolithic Homo sapiens groups drew, painted and engraved non-figurative signs from at least ~42,000 bp and figurative images (notably animals) from at least 37,000 bp. Since their discovery ~150 years ago, the purpose or meaning of European Upper Palaeolithic non-figurative signs has eluded researchers. Despite this, specialists assume that they were notational in some way. Using a database of images spanning the European Upper Palaeolithic, we suggest how three of the most frequently occurring signs—the line <|>, the dot <•>, and the <Y>—functioned as units of communication. We demonstrate that when found in close association with images of animals the line <|> and dot <•> constitute numbers denoting months, and form constituent parts of a local phenological/meteorological calendar beginning in spring and recording time from this point in lunar months. We also demonstrate that the <Y> sign, one of the most frequently occurring signs in Palaeolithic non-figurative art, has the meaning <To Give Birth>. The position of the <Y> within a sequence of marks denotes month of parturition, an ordinal representation of number in contrast to the cardinal representation used in tallies. Our data indicate that the purpose of this system of associating animals with calendar information was to record and convey seasonal behavioural information about specific prey taxa in the geographical regions of concern. We suggest a specific way in which the pairing of numbers with animal subjects constituted a complete unit of meaning—a notational system combined with its subject—that provides us with a specific insight into what one set of notational marks means. It gives us our first specific reading of European Upper Palaeolithic communication, the first known writing in the history of Homo sapiens.

The physical nature of cave walls and its impact on Upper Palaeolithic image making and viewing has frequently been invoked in explanations about the function of cave art. The morphological features (convexities, concavities, cracks and ridges) are frequently incorporated into the representations of prey animals that dominate the art, and several studies have attempted to document the relationship between the cave wall and the art in a quantitative manner. One of the effects of such incorporation is that undulating walls will distort the appearance of images as viewers change their viewing position. Was this distortion deliberate or accidental? Until now, the phenomenon has not been investigated quantitatively. We address this here, analysing 54 Late Upper Palaeolithic animal images deriving from three Cantabrian caves, Covalanas, El Pendo and El Castillo. We introduce a novel use for photogrammetry and 3D modelling through documenting the morphology of these caves’ walls and establishing the specific relationship between the walls and the art created on them. Our observations suggest that Palaeolithic artists deliberately placed images on very specific topographies. The restricted nature of these choice decisions and the fact that the resulting distortions could have been avoided but were not suggest that the interaction between viewer, art and wall was integral to the way cave art functioned.

The timing and nature of the emergence of art in human evolution has been one of the more debated subjects in palaeoanthropology in the last few years, and one of the areas where archaeology has made impressive advances. Here, we discuss the first evidence of figurative art on portable materials in the north of Spain. After analysis of the stratigraphic contexts of all examples potentially of this age, which eliminated those of uncertain provenance, only three examples can be said to be Gravettian with a degree of confidence. We examine their stratigraphic provenance, the integrity of their archaeological contexts, and the absolute dates available for them. We then discuss their thematic and stylistic traits, comparing them to the wider database of material in the adjacent regions of the French Pyrenees and Mediterranean Iberia. We conclude that figurative depictions were scarce in the Gravettian of south-western Europe, in contrast to the relatively abundant examples of cave art assigned to this period in the region. If this is correct, we should nuance our discussions of ‘Palaeolithic art’ by considering that parietal and portable art had their own trajectories and functions, at least in the Early to mid-Upper Palaeolithic.

Archaeologists have struggled for more than a century to explain why the first representational art of the Upper Palaeolithic arose and the reason for its precocious naturalism. Thanks to new data from various sites across Europe and further afield, as well as crucial insights from visual science, we may now be on the brink of bringing some clarity to this issue. In this paper, we assert that the main precursors of the first figurative art consisted of hand prints/stencils (among the Neanderthals and early Homo sapiens) and a corpus of geometric marks as well as a hunting lifestyle and highly charged visual system for detecting animals in evocative environments. Unlike many foregoing arguments, the present one is falsifiable in that five critical, but verifiable, points are delineated.

Recent anatomical analyses of a human maxilla found in 1927 in the Vestibule at Kent's Cavern, Devon, UK, have been interpreted as confirming its taxonomic status as Homo sapiens, while Bayesian modelling of dated fauna apparently ‘associated’ with it has been interpreted as suggesting a calendar age for the maxilla of around 44,200–41,500 years BP, rendering it the earliest fossil evidence for modern human presence in Northern Europe. In this paper, we examine fully the circumstances of the maxilla's discovery, data not previously considered. Based mostly on archival and limited published materials, as well as knowledge of the cave's stratigraphy, we provide a detailed examination of the context of the maxilla and associated finds. We urge caution over using a small selected sample of fauna from an old and poorly executed excavation in Kent's Cavern to provide a radiocarbon stratigraphy and age for a human fossil that cannot be dated directly, and we suggest that the recent dating should be rejected. We place our evaluation in the wider context of the dating of European early anatomically modern humans.

It is now 20 years since the discovery of the Grotte Chauvet with its impressive cave art, but controversy continues over the antiquity of the images. Radiocarbon assays have been used to argue that the ‘black series’ charcoal drawings date to the Aurignacian period, more than 20 000 years earlier than traditional stylistic models would suggest. This paper questions the validity of the radiometric dating and cautions against reliance solely on the date of the charcoal. Instead, the authors propose an alternative chronology for the art of Chauvet based on stylistic comparanda, palaeontological remains and stratigraphic evidence.

Hand stencils are an intriguing feature of prehistoric imagery in caves and rockshelters in several parts of the world, and the recent demonstration that the oldest of those in Western Europe date back to 37 000 years or earlier further enhances their significance. Their positioning within the painted caves of France and Spain is far from random, but responds to the shapes and fissures in the cave walls. Made under conditions of low and flickering light, the authors suggest that touch—‘palpation’—as much as vision, would have driven and directed the locations chosen for these stencils. Detailed study of the images in two Cantabrian caves also allows different individuals to be distinguished, most of whom appear to have been female. Finally, the project reveals deliberate associations between the stencils and features on the cave walls.

The combination of robotics and medical imaging may soon provide orthopaedic surgeons with a tool that significantly increases the precision of cementless total hip replacement operations and directly links preoperative planning with surgical execution. Twenty-six successful robot-assisted operations have been performed on dogs and the first clinical trials on human patients have recently taken place.