Summary In this study we compare the genetic ancestry of individuals from two as yet genetically unstudied cultural traditions in Estonia in the context of available modern and ancient datasets: 15 from the Late Bronze Age stone-cist graves (1200–400 BC) (EstBA), and 6 from the Pre-Roman Iron Age tarand cemeteries (800/500 BC–50 AD) (EstIA). We also included 5 Pre-Roman to Roman Iron Age Ingrian (500 BC–450 AD) (IngIA) and 7 Middle Age Estonian (1200–1600 AD) (EstMA) individuals to build a dataset for studying the demographic history of the northern parts of the Eastern Baltic from the earliest layer of Mesolithic to modern times. Our findings are consistent with EstBA receiving gene flow from regions with strong Western hunter-gatherer (WHG) affinities, and EstIA from populations related to modern Siberians. The latter inference is in accordance with Y chromosome (chrY) distributions in present-day populations of the Eastern Baltic, as well as patterns of autosomal variation in the majority of the westernmost Uralic speakers [1–5]. This ancestry reached the coasts of the Baltic Sea no later than the mid-first millennium BC; i.e. in the same time window as the diversification of west Uralic/Finnic languages [6]. Furthermore, phenotypic traits often associated with modern Northern Europeans like light eyes, hair and skin as well as lactose tolerance can be traced back to the Bronze Age in the Eastern Baltic.

There have been various explanations in archaeological literature about whether the earliest Bronze Age stone-cist graves and the first Pre-Roman Iron Age tarand graves in Estonia were built by locals or non-locals. As to possible immigrations, the stone-cist graves have been often related to Scandinavian populations, whilst early tarand graves allegedly had roots in eastern directions. The oldest known examples of these cemetery types are at Jõelähtme and Muuksi for stone-cist graves, and at Ilmandu and Kunda for early tarand graves, in the coastal zone of northern Estonia. In order to test the migration hypothesis we carried out a bioarchaeological study, measuring and mapping local biologically available Sr and O isotope ratios and analysing stable isotope signals of altogether eight individuals from these early stone-cist and tarand graves. The study material was chosen on the basis of the oldest AMS dates of skeletons available so far, or according to the earliest burial constructions in the cemeteries. Based on the comparison of local biologically available Sr and O isotopic baseline results and the results obtained from the individuals, we can talk about migrants in the case of two persons from Kunda and perhaps one from Muuksi, whilst most of the individuals analysed are of local origin. Thus, the idea of Early Metal Period migrations to Estonia from the surrounding regions is supported to some extent. However, the discussion of these migrations might turn out to be surprisingly different from what is expected on the basis of material culture. We also emphasise the importance of further analysis, especially mapping isotopic baseline data in the eastern Baltics, in order to draw further conclusions about the directions and extent of prehistoric migration in this region.

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The article presents the results of osteological analysis and radiocarbon dating of the bones from Jaani stone grave(s) at Väo, excavated in 1982. The study of human bones revealed the remains of at least 38 individuals of various age groups. Due to heavy fragmentation and intermingling of bones, it was possible to reconstruct only one skeleton in cist A, while the distribution, location and details of burial mode for other inhumations remain questionable. Zooarchaeological analysis revealed a pattern generally compatible with other contemporary sites, but unexpectedly, a radiocarbon date of a sheep bone turned out to be recent, suggesting caution in interpretation and need for more frequent 14 C-dating of animal remains. Radiocarbon dates of the human remains show that stone-cist grave B was present in the Late Bronze Age, but grave A probably originates from the Early Pre-Roman Iron Age (5th c. BC) and may thus be one of the latest stone-cist graves in Estonia. We were unable to radiocarbon-date the original bone deposit of the ship grave, but it is nevertheless likely that the ship is (one of) the oldest structure(s) at the site. The site also includes interments from Roman, Migration and Pre-Viking periods, when it was probably reserved for predominantly child and infant burials. A few deposits of burnt human bone from at least three individuals perhaps also date from this use-phase.

The article discusses new AMS dates of the human bones at stone-cist grave I at Kaseküla, western Estonia, in the context of previously existent radiocarbon dates, artefact finds and osteological studies. There are altogether 12 radiocarbon dates for 10 inhumations (i.e. roughly a third of all burials) of the grave, provided by two laboratories. The dates suggest three temporally separated periods in the use life of the grave(s): the Late Bronze Age, the Pre-Roman Iron Age and the Late Iron Age. In the latter period, the grave was probably reserved for infant burials only. Along with chronological issues, the article discusses the apparently unusual structure of the grave and compares two competing osteological studies of the grave's bone assemblage from an archaeologist's point of view.

Fifteen radiocarbon dates of inhumed burials were obtained for the 36 stone-cist graves at Jõelähtme, the largest completely excavated stone-cist cemetery in Estonia, to confirm and complement the typo-chronological date based on the Nordic Bronze Age chronology. The bronze artefacts of Nordic origin, such as razors, tweezers, double buttons, and looped toggles, in which the cemetery is, in the local context, exceptionally rich, date from Montelian Periods IV and V, more specifically perhaps around the turn of the periods. This is in good accordance with the radiocarbon dates, which show that burial began around 1000 BC at the latest and ended around 900 BC at the earliest. It is likely that the lifespan of the cemetery was longer between 1100 (less likely, 1200) and 800 BC. Besides the human remains, a dog bone and a cat bone were radiocarbon dated to ca AD 260-540 and 990-1160, respectively. Particularly surprising was the late date for the dog, because the separate cist apparently built for dogs suggested a date contemporary with the Bronze Age burials.

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It has been hypothesised that the chicken (Gallus gallus domesticus) was introduced to the area of what is now modernday Estonia around the PreRoman or Roman Iron Age. However, none of the earliest chicken bones found in the area had been radiocarbon dated and due to a complex contextual background, the question of its first appearance has been left open. With the aim of finding the earliest evidence for the chicken in Estonia, we looked into the zooarchaeological material from twelve archaeological sites, including burial grounds, settlement sites, and hillforts. The earliest evidence had been reported at four of these sites, but during the taxonomic reassessment, no chicken bones were identified. From the remaining eight sites, nine chicken bones were radiocarbon dated by AMS. The sample from a stonecist grave at Rebala (northern Estonia) was dated to 200 calBCE -5 calCE, which means that this individual is the earliest confirmed chicken in Estonia. The other dates range from the PreViking Age to the Modern Period, with some of them illustrating the complicated nature of faunal remains in archaeological contexts. Although this study elucidates the first appearance of the chicken in Estonia and in the Baltic region in general, its origin, ways of exploitation, and the extent of its spreading remain to be studied.