Timbuktu, an iconic destination for medieval caravans crossing the Sahara, has a prehistoric phase, here before AD 1000, which shows varying urban traits. The author's new project examines the context of Timbuktu's prehistoric urbanism by mapping the settlement patterns in its hinterland, and seeks to understand the social impacts of the Sahara's changing climate.

Arguing from a critical reading of the text, and scientific evidence on the ground, the authors show that the myth of Phaethon – the delinquent celestial charioteer – remembers the impact of a massive meteorite that hit the Chiemgau region in Bavaria between 2000 and 428 BC.

The anniversary of the abolition of slavery was justly celebrated worldwide in 2007. But what is the character of freedom, how does it relate to material culture, and how can archaeology study it? The author here summarises ideas he has been developing in Jamaica and York over the past two years.

A Late Antique burial in central-western France contained the skull and long bones of two individuals, overlaid by the parts of an equid carcass. What are we to make of such a deposit? Clearly it does not relate to an ethnic or ritual norm. The authors lead us through the ways that such a rite might be decoded.

The author shows how houses in the northern Baltic were constructed using two realities: the reality of timber and the equally potent reality of spirits supporting and controlling the fate of structures. Excavations in seventeenth-century Tornio (now in modern-day Finland) showed that houses were furnished with special offerings when founded and refurbished, while evidence from living folklore suggested that the houses themselves were originally given spiritual personalities and were treated as members of the family. As more modern thinking took hold, this spirituality was transferred to the more mobile and skittish household sprites.

The occupation of the Channel Islands during World War II and its subsequent commemoration, memorialisation and re-enactment as heritage offers a parable for the advent of materiality in many other periods and places. The author draws a contrast between the official and the clandestine at the time of occupation, and points out the even more illuminating contrast between first hand domestic memories gradually fading with the generations and the public recognition of the events in museums, monuments and memorials – which on some islands took more than half a century to come to pass.

The authors explore the practice of extracting the thighbone from burials in Mesoamerica, making use of a newly excavated Classic period Zapotec burial at the Mitla Fortress, where the femur had been carefully removed and the interment resealed. They conclude that the femur acted as an ancestral emblem and could be used by families of relatively low social rank. This function contrasts with the Aztec, where the large bones could also be used as war trophies. Archaeological readers studying ancestor worship and the cult of relics in other continents will find much of value here.

How useful is the archaeology of the present? In this tour de force the author takes an iconic structure of modern times – the radio telescope at Jodrell Bank – and reveals the conjuncture of its origins and its subsequent parallel lives in science, war, politics and the imagination. The modern example allows us to get behind the scenes and under the covers – into the mentality of monumentality, as it has probably always been, proxy for the zeitgeist. Sceptics should read on…

The author shows how several of the great ruins of Sasanian cities of the last centuries BC are enriched by a vivid documentation. And while archaeological study is only just beginning, it clearly has exceptional potential for mapping the social order onto the streets and buildings.

A log-coffin excavated in the early nineteenth century proved to be well enough preserved in the early twenty-first century for the full armoury of modern scientific investigation to give its occupants and contents new identity, new origins and a new date. In many ways the interpretation is much the same as before: a local big man buried looking out to sea. Modern analytical techniques can create a person more real, more human and more securely anchored in history. This research team shows how.

During its development years, geophysical survey has served field archaeology by defining possible sites underground, prior to excavation or preservation. Now we can see the art taking off as a research method in its own right. After summarising some recent research applications of magnetic mapping, the author gives us three case studies from USA and Jordan, where ground-penetrating radar (GPR) has produced new interpretations of prehistory and history. Since GPR can map in horizontal slices without damage, it opens up important heritage preservation options. In one case, excavation was discouraged on ethical grounds, in another it was inhibited by the presence of later monuments and in a third, an early agricultural site, the GPR actually saw more than the excavators. This presages a research tool of particular power.

The excavation of 81 skeletons at Cerro Cerrillos provided the occasion for a rigorously scientific deconstruction of human sacrifice, its changing methods and its social meaning among the Muchik peoples of ancient Peru. This paper shows how bioarchaeology and field investigation together can rediscover the root and purpose of this disturbingly prevalent prehistoric practice. Be warned: the authors' clinical and unexpurgated accounts of Andean responses to the spirit world are not for the fainthearted.

The author is exploring the site of Kumako in Suriname, a destination for Maroons escaping from plantations in coastal Suriname between the seventeenth and eighteenth centuries. She finds evidence for a structured settlement, distinctive pottery and local ritual practices, raising new questions about the degree of interaction and acculturation between Maroons and indigenous people.

The existence of low-level food producers, neither wholly hunter-gatherers nor wholly agriculturalists, is predicted but hard to prove. Here the authors use lithics, the one ubiquitous common indicator, to show how the detection of missing flakes can indicate degrees of mobility, while mobility in turn shows how people coped with the unpredictable appearance of food resources. In Australia, they were opportunists, armed with a ready cutting edge. In the Fayum, they had less far to go, but still roamed.

Round and rectangular buildings with grain silos at a Copper Age site in Israel suggested social stratification to the excavators. Using micromorphology, the author demonstrates that while the rectangular building was occupied by people, the round ones had contained animals, perhaps as providers of milk, and dung for fuel. While this removes the direct indication of social variance, it strengthens the argument that animals, as well as grain, formed the basis for the creation of surplus.

Grinding stones have provided a convenient proxy for the arrival of agriculture in Neolithic China. Not any more. Thanks to high-precision analyses of use-wear and starch residue, the authors show that early Neolithic people were mainly using these stones to process acorns. This defines a new stage in the long transition of food production from hunter-gatherer to farmer.

The cremation urn is a tiny archaeological site of its own, with finds, features, stratification and structure. The old prescription was to take the pot apart, or slice it, and micro-excavate with inevitable damage and loss. Here is a new methodology – the application of a CT scan as used in medicine. The authors evaluate the results on 35 Etruscan cremations, finding that CT not only provides an excellent guide for micro-excavation, but allows the degree of fragmentation to be appreciated inside the pot and maps those metal objects that have corroded to a crust and do not survive excavation. They emphasise the value of the method in making a ‘first resort’ primary record especially in commercial archaeology.

Road systems in the service of empires have long inspired archaeologists and ancient historians alike. Using etymology, textual analysis and archaeology the author deconstructs the road system of the Khmer, empire builders of early historic Cambodia. Far from being the creation of one king, the road system evolved organically to serve expeditions, pilgrimages and embedded exchange routes over several centuries. The paper encourages us to regard road networks as a significant topic, worthy of comparative study on a global scale.

The rock-cut churches of Ethiopia have long intrigued visitors and historians – and have frustrated archaeologists seeking their sequence of construction. Do they belong to one grand ceremonial monastic plan, or a long-lived ritual centre, continually refashioned over time? Since the churches are cut into live rock, the conventional signals of archaeological phasing are hard to find. The authors address these problems at the famous site of Lalibela, showing that, embedded in the cuts and openings, the spoil heaps, and even in the now vanished sediments, the stratigraphic sequence is there to be read.

The Iron Age sequence in the southern Levant is one of the most evocative and provocative in ancient history, since it coincides with events remembered in the Hebrew Bible (Old Testament). The authors show how a scientific chronological framework can be created and contribute an independent voice to the historical debate. They also show that, if archaeology is to complement history, such a framework requires an especially rigorous application of precision, in context definition, data handling and Bayesian radiocarbon dating, and urge such application to forthcoming work at the key Biblical site of Megiddo.