This update on radiocarbon calibration results from the 19th International Radiocarbon Conference at Oxford in April 2006, and is essential reading for all archaeologists. The way radiocarbon dates and absolute dates relate to each other differs in three periods: back to 12400 cal BP, radiocarbon dates can be calibrated with tree rings, and the calibration curve in this form should soon extend back to 18000 cal BP. Between 12400 and 26000 cal BP, the calibration curves are based on marine records, and thus are only a best estimate of atmospheric concentrations. Beyond 26000 cal BP, dates have to be based on comparison (rather than calibration) with a variety of records. Radical variations are thus possible in this period, a highly significant caveat for the dating of middle and lower Paleolithic art, artefacts and animal and human remains.

Why did Palaeolithic people wear shells, and why was the practice so widespread in the world? The authors' own researches in Western Australia show that specific marine shells were targeted, subject to special processes of manufacture into beads and that some had travelled hundreds of kilometres from their source. Whether they were brought in land by the manufacturers, or by specially ornamented people, these beads provided a symbolic language that somehow kept the early peoples of Australia in touch with the sea.

The Teouma site, on Efate in central Vanuatu, was uncovered during quarrying in 2003 and has proved to be one of the most significant discoveries to date for the colonisation of Remote Oceania. Not only did it bring to light a fine assemblage of the famously diagnostic Lapita ceramics, but a cemetery of more than 25 individuals along with the pots. The skeletons offer an opportunity to investigate the origins of the ‘Lapita people’ who first appeared in the Bismarck archipelago around 3300 years ago and rapidly moved through island Melanesia and Western Polynesia over the next few centuries.

Recent research including 781 radiocarbon dates and the excavation of Ses Arenes de Baix, has allowed a new review of the sequence of megalithic burial practice on Menorca. Rock-cut tombs, dolmens, caves with entrance-works and the famous boat-shaped houses and tombs (navetes) are placed in overlapping chronological order. The authors suggest that, while aware of contemporary developments on the continent, the Bronze Age islanders absorbed immigrants and made their own local choices of memorial architecture.

The Minusinsk Basin is located where China, Mongolia, Siberia and Kazakhstan meet. Enclosed, but broad, and rich in copper and other minerals, the valley offers missing links between the prehistory of China and that of the greater Russian steppes. In the late Bronze Age the material from Minusinsk was important for the origins of bronze metallurgy in China, and in the Iron Age the area was a focus for the development of that equestrian mobility which was to become the elite way of life for much of the Eurasian steppe for more than a millennium.

We are privileged to publish the following two papers deriving from research at the Institute for the History of Material Culture at Saint Petersburg, which give us the story so far on the archaeology of this remarkable place. In The emergence of the Karasuk culture Sophie Legrand discusses the people who occupied the Minusinsk Basin in the Bronze Age, and in The emergence of the Tagar culture, Nikolai Bokovenko introduces us to their successors, the horsemen and barrow-builders of the first millennium BCE.

The iron-axe hammer from the Mound 1 ship-burial at Sutton Hoo is reinterpreted as an instrument for sacrificing animals by pole-axing. As such it is a symbol of the leader-as-priest who was a feature of both Germanic and Roman pre-Christian society. (The editor is most impressed with this interesting suggestion).

The authors study burials of the medieval period in western Mongolia shortly before emergence of Genghis Khan. They find that both inhumation and cremation are practised, with a variety of accompanying rituals. Systematic micro-analysis of bone fragments on the one hand, and the accounts of early travellers on the other, allow these researchers to propose detailed explanations of mortuary practice in thirteenth century Altai that will be highly suggestive to prehistorians working elsewhere.

The authors describe an ingenious Aztec form of irrigated field system and assess its costs and benefits. Swamps were reclaimed by digging channels by hand and the excavated soil used to construct embanked fields (chinampas). The banks were anchored by planted trees and the trees, the crops and the water channels created a sheltered space which itself raised the temperature and increased productivity. The construction of the whole system took 25 million person-days spread over 40 years. In their study of the energetics of construction, the authors show that this project, forced on the local community, was within their capacity and comparable to the labour expended on the production of cloth.

A long section adjacent to a former obsidian quarry on Easter Island (Rapa Nui) reveals a sequence of agricultural strategies, beginning with the clearing of palm trees in the twelfth century AD, and the making of an open garden growing yams and taro, that continued through the fifteenth century. The later phases between the seventeenth and nineteenth centuries include veneer and boulder gardens that reflect the broader strategy employed by the islanders to fight the increasingly arid soil.

Amongst the numerous images found on the walls of Palaeolithic caves, fluted lines, made by fingers dragged through a skin of wet clay remain some of the most intriguing. In their study of images at Rouffignac, the authors undertook experiments with a range of modern subjects who replicated the flutings with their hands. Comparing the dimensions of the experimental flutings with the originals, they conclude that the patterns on the roof of Chamber A1 at Rouffignac were made by the fingers of children aged between 2 and 5 years old. Given the current height of the chamber, such children would have needed to be hoisted aloft by adults. Who knows what lessons in art or ritual were thereby imparted to the young persons…

Using strontium isotope measurements on the teeth of fallow deer found at Fishbourne, the authors argue that these elegant creatures were first introduced into Britain as a gift to the Romanised aristocracy. Kept and bred in a special enclosure at the palace, they provided more than a status symbol and gastronomic treat: the fallow deer was an emblem of Empire.

Exploring parallels between the careers of Lt.-General Pitt Rivers and Verne's Captain Nemo, this essay is concerned with time and disciplinary flagships. It considers how their respective collection activities propelled their very personal projects of science and, in the case of the General, its interrelationship with the institutionalisation of archaeology in the later nineteenth century. In particular, the implications of his renowned excavation medallion will be discussed and compared to a celebrated time capsule of the period; it being argued that ‘deep time’ consciousness itself engendered notions of futuristic projection.

In 1996 ‘Internet Archaeology’, the first peer-reviewed e-journal for Archaeology, published its first edition (Heyworth et al. 1997). Later the same year the Archaeology Data Service, the first digital archive for archaeology, was established (Richards 1997). Ten years on, this paper examines the rapid changes which have taken place in electronic publication and looks forward to the next ten years. It examines the pressures on traditional journal publication, and discusses the potential impact on Archaeology of the next Internet revolution, the Semantic Web.

Are modern artworks really comparable in any serious way to ancient monuments? Has Colin Renfrew changed sides in the conflict of reason with intuition in modern archaeology? Leo Klejn thinks so. Colin Renfrew responds, below.

Roger Mercer, prehistorian and formerly Secretary of the Royal Commission of Ancient and Historical Monuments for Scotland, looks back.