In the western Nefud, I was part of the team that has identified multiple Middle Palaeolithic sites. At KAM-4, for instance, we found three Middle Palaeolithic assemblages of different ages. At Al Wusta we found not only an interesting lithic assemblage, animal fossils including hippos, but something that we have spent a a lot of time looking for…a hominin fossil! In fact, this fossil – the middle finger bone (phalanx), probably of the middle finger – is the only pre-Holocene hominin fossil known from Arabia. I led a paper on this fossil and site, and fortunately it turned out that this particular bone is usefully diagnostic. The shape of the fossil indicated that it belonged to Homo sapiens, rather than another species such as Neanderthals (link). We were also able to directly date the fossil, and also date animal bones from the site, which all indicate that it dates to around 85-90 thousand years ago. This finding showed that the ‘early’ (i.e. MIS 5) migrations of our species out of Africa were not merely limited to the Levantine area, but extended deep into Arabia (and with recent findings in eastern Asia, maybe much further!).
How did these early humans get to Arabia? To explore this question I have worked with various colleagues. Aside from stone tool comparative studies, a key part of this involves exploring the spatio-temporal distribution of archaeological sites and how this correlates with environmental conditions. For instance, we demonstrated how fluvial corridors linking the southern Levant and northern Arabia existed at key points of the past (link). Working with Sam Nicholson and colleagues, we explored the relationship between sea level and regional climate in terms of the hypothesised Red Sea crossing in the Bab al Mandeb area. We found that this route was unlikely – as it already seemed to me based on the archaeological record of Arabia – because local climatic amelioration lagged behind sea level rise (link).
I have also been involved in research on the late prehistory of Arabia. As much as I love stone tools – and it has been a pleasure to work on Neolithic stone tool assemblages from both southern and northern Arabia (e.g. link), it is also enjoyable to be able to work with more diverse kinds of evidence for this more recent period. It is also nice to work in a period when radiocarbon dating can be used, allowing clearer correlations between humans and climate than for earlier periods (e.g. link). Working with colleagues such as Maria Guagnin I have been involved in studies of rock art in northern Arabia, where ancient humans engraved sandstone cliffs and boulders and left a fascinating cultural legacy (link, link, link). Our work highlighted the significance of areas such as Shuwaymis with its spectacular rock art, and they subsequently became UNESCO sites.
The Holocene also sees a proliferation of various stone structures, a topic that I have become increasingly fascinated by. While we often think of Arabia as a land of sand dunes, much of the surface of the area actually consists of rock. From sandstone ‘jebels’ emerging from between sand dunes, to the remains of ancient lava flows which often weather into vast masses of blocks of rock of a very convenient size for building, there is a lot of rock around, which ancient societies took full use of. And this was perhaps catalysed by a relative paucity of organic materials such as wood, and likewise the character of erosion and deflation in the area means a highly visible record. The end result is that across Arabia, there are thousands and thousands of stone structures. They cover at least the last ten thousand years, and range from dwellings, to ritual structures, to giant hunting traps.
As with most else in Arabian archaeology, little specific was known about prehistoric stone structures in Arabia until the recent past. I have been involved in studies on stone structures which have helped improve our understanding. The first form refer to ‘mustatils’ (the word means rectangle in Arabic). While previous work had mentioned the existence of these large (upto 600 m long) structures, very little was known of them. My own interest came from the fact that to get to Palaeolithic sites such as Al Wusta in the Nefud Desert, we drove through an area containing these structures. We conducted the first on-the-ground surveys of them, and were able to obtain a radiocarbon date from one, showing that it was around 7000 years old (link). These structures were enigmatic; there was very little associated archaeology around them, and little initial clear reason on why Neolithic people in the area had built hundreds of these structures. It seemed that they were ritual structures built by pastoralist societies, in the context of the later part of the Holocene humid period. It has been great to see other teams in the region follow this foundation and a variety of excavations and surveys are currently ongoing. My PhD student, Amy Hatton, is currently conducting spatial analysis of mustatils and their landscape positioning.
The other kind of stone structure that I have worked on are known as ‘desert kites’. These are vast structures consisting of converging walls to an enclosed area. These are believed to be giant hunting traps, into which herds of animal like gazelle could be funnelled and killed. These kites are best known from areas like Jordan, but were also known from northern Arabia, Syria, etc. In fact, similar although somewhat simpler, structures are known from areas as diverse as the Nile Valley, South Africa, and Yemen. We therefore have another example of a situation where different hypotheses can be proposed to explain similarities in material culture, i.e. convergent evolution or some kind of dispersal or diffusion. Some researchers begin with very restrictive definitions of desert kites, based on the most complex forms, and say that other forms are merely ‘kite-like’. In general when it comes to comparing similarities in material culture, I prefer to start in broad terms and I think that we need to focus on quantitative comparisons rather than arguing about narrow definitions.