Provenience,age and associations of archaic Homo sapiens crania from Lake Eyasi,Tanzania

Fifty years ago, an ethnographic expedition found primitive human fossils at Lake Eyasi, Tanzania. Subsequent emphasis has centered almost exclusively on cranial morphology, neglecting the discovery site and associated finds. Fauna has been deemed “essentially modern” and racemization dates suggest a late Pleistocene age for the hominid remains; these assessments have been advanced as consistent with a “terminal Middle Stone Age” antiquity. Based on recent observations at the site and new sediment analyses, a provisional sequence is now proposed: an earlier formation, the Eyasi Beds, is distinguished from later Pleistocene deposits, the Mumba Beds, the latter being partially calibrated by uranium series and radiocarbon dates. This evidence indicates that the Eyasi Beds, the probable source of the human fossils, are older than 130,000 years, and the fauna may include seven extinct large mammal species. Documented Eyasi Beds artifacts are mostly unspecialized Middle Stone Age types; no typological or technical features suggest later MSA specializations or innovations foreshadowing Later Stone Age industries. A series of core tools from the lakeshore suggests an industry of Sangoan aspect. All lines of evidence from the locality contradict the young amino acid racemization dates; artifacts and fauna, including archaic Homo sapiens remains, are of probable Middle Pleistocene age.     

Age profiles of rhino fauna from the Middle Pleistocene Nanjing man site,south China—explained by the rhino specimens of living species

A total of 60 pieces of rhino materials have been identified from the Nanjing Man site. Morphologically, they belong to the species Dicerorhinus mercki. Among the materials, 40 pieces are broken bones, and 20 are isolated teeth or jaw bones (totally comprising 41 tooth units). Among the teeth, 74% are deciduous, most of them attached to jaws. Other isolated teeth are not greatly worn, meaning they were not naturally replaced, so they represent juvenile animals. Because the skeletons are completely isolated and most of them are broken, their death can not be attributed to a natural trap. Therefore, it is very probable that hominid activities were associated with rhinos at this site. Copyright © 2001 John Wiley & Sons, Ltd.     

The application of 3D‐microprofilometry as a tool in the surface diagnosis of fossil and sub‐fossil vertebrate hard tissue. An example from the Pliocene Upper Laetolil Beds,Tanzania

Non‐contact optical 3D‐profiling instruments are often used in the study of surface modifications on fossil mammalian bone. The advantage of optical laser scanning for the study of fossil and sub‐fossil bone is its non‐contact nature, allowing the investigation of fragile and poorly preserved surfaces. The high resolution and fast measuring rate of this method make it an alternative to scanning electron microscopy (SEM) investigation if topography is to be visualized. This study analyses clusters of incisions in a suid humeral fragment from the Pliocene Upper Laetolil Beds. The marks show a characteristic crest structure that is also frequently found in mandible marks produced by the Australian termite species Mastotermes darwiniensis. The marks from the Laetolil Beds are, therefore, interpreted as also being caused by insect mandible action. An as yet unknown large insect species capable of modifying bone with their mandibles is thus postulated in the palaeohabitat represented by the hominid‐bearing Upper Laetolil Beds. Copyright © 2001 John Wiley & Sons, Ltd.     

Exponential Decline in the Dispersal of Stone Artefacts in Roman Britain: Further Expressions of Trade

Several industries that exploited stone are known to have sprung up in Iron Age–Roman and Roman Britain. They include the fashioning of rotary querns from the Upper Old Red Sandstone of the Forest of Dean and the Lower Cretaceous Hythe Beds (Lodsworth rock) of West Sussex, the production of whetstones from sandstones in the Weald Clay Formation of the north‐west Weald, and the manufacture of a wide range of products from the Upper Jurassic Purbeck Marble of south‐east Dorset. The dispersal of goods from these sources is found to exhibit a similar exponential decline with distance to that previously demonstrated for prehistoric stone artefacts and Romano‐British ceramics. Evidently, interactions at settlements led to the retention of a roughly constant proportion of the goods brought there.     

On the occurrence of the scimitar-toothed cat, Homotherium latidens (Carnivora; Felidae), at Kents Cavern,England

Teeth of Homotherium latidens recovered from late Pleistocene sediments, Kents Cavern, England have long been the source of controversy. H. latidens is conspicuously absent from other late Pleistocene cave deposits in Britain, and is widely thought to have been extirpated from the region during the isotope stage 10 glacial period. Here we present high spatial resolution analyses of fluorine and uranium uptake profiles in teeth of three species from the same cave. The H. latidens tooth is clearly distinguished from the unambiguously provenanced Late Pleistocene hyaena and Middle Pleistocene cave bear teeth. These results are consistent with the theory that the H. latidens teeth originated at an exogenous location, were probably transported to Kents Cavern as Palaeolithic trade goods, and were buried in Kents Cavern in Palaeolithic times.     

A new Late Devonian acanthodian fish from the Hunter Formation near Grenfell,New South Wales

The ischnacanthid acanthodian Grenfellacanthus zerinae gen. et sp. nov. is described on the basis of two large jaw bones from the Late Devonian (late Famennian) Hunter Formation, near Grenfell, N.S.W. The new species is the youngest known ischnacanthid, and the largest ischnacanthid from Gondwana. As for many ischnacanthids, the structure of the jaws and teeth indicate that Grenfellacanthus was probably an ambush predator.     

Experimental studies of personal ornaments from the Iron Gates Mesolithic

Personal ornaments, especially those made from the shells of marine mollusks and animal teeth, have been recovered from many Mesolithic sites across Europe. This paper reviews the evidence of personal ornaments from the Mesolithic of the Iron Gates, where such finds were identified in five sites on the Romanian bank: the cave and rock shelter sites of Climente II and Cuina Turcului, and three open-air sites—Icoana, Ostrovul Banului, and Schela Cladovei. The ornaments from these sites were made from the shells of several gastropod taxa and at least one species of dentaliid scaphopod, as well as the pharyngeal teeth of cyprinids, the teeth of several species of terrestrial mammal, fish vertebrae, and pieces of antler and bone. Particular attention is given to taxonomic identification and questions of taphonomy, provenance, selection, manufacture, and use. Experiments were conducted in which several types of ornament were replicated. Archeological and experimental pieces (at various stages of production) were examined under a microscope, to establish the durability of the beads and estimate the length of time over which they were worn. Our results show that shells of Lithoglyphus and Theodoxus sp. were simply perforated and fixed in composed adornments, as were shells of Tritia neritea in the early part of the time range. In the later Mesolithic, T. neritea shells were processed in a different way and fixed to clothing in the manner of appliqués. No technological modification of the cyprinid teeth was observed; these were sewn individually onto clothing by means of a thread coated with an adhesive substance. The other categories of personal ornament were used mainly as pendants. Experimental use-wear analysis suggests that many ornaments were used over long periods, with broken or missing pieces replaced when necessary.     

North-south asymmetry in the ionospheric equatorial anomaly in the African and the West Asian regions produced by asymmetrical thermospheric winds

The effect of asymmetrical thermospheric winds on NmF2 at the dip I = 30° and its magnetic conjugate point have been computed for equinox conditions to study asymmetry in the ionospheric equatorial anomaly in the African and West Asian regions. The wind models of I11 et al. and Chan and Walker have been used in our computations. During the daytime, due to the winds NmF2 in the northern crest becomes greater than NmF2 in the southern crest; at night the reverse is true in both regions. It is shown that the observed asymmetry in NmF2 at the equatorial crest in the African sector can be well explained by considering the effects of asymmetrical winds with respect to those in the West Asian sector.     

Calculus,periodontal disease and tooth decay among the prehispanic population from Gran Canaria

In the prehispanic Gran Canaria there are some anthropological differences between the coastal inhabitants who buried their dead mainly in tumuli, and those from the central mountains, mainly buried in caves. Some data, as the prevalence of auricular exostoses, and a different bone Ba/Sr ratio support the view that there were differences in economy and diet between both groups of islanders. Moreover, the proportion of carious teeth was significantly higher among the population buried in caves. In the present study we analysed the prevalence of dental calculus, periodontal disease and antemortem tooth loss in remains of 791 individuals belonging to the anthropological collection of the Museo Canario (Las Palmas). Calculus deposition was very frequent (88.51%), no differences existing between men and women or between those interred in tumuli or in caves. Age at death was the only parameter independently related to calculus deposition by stepwise multivariate analysis. Periodontal disease was observed in 66.78% of the population, significantly more in men (χ² = 4.88, P = 0.027). No differences existed between individuals buried in tumuli and in caves. Antemortem teeth loss was observed in 64.73% of individuals, no differences existing between men and women or between those interred in tumuli or in caves. There was a significant association between calculus and periodontal disease (χ² = 18.07, P < 0.0001). Both caries (χ² = 8.40, P = 0.004) and periodontal disease (χ² = 44.96, P < 0.0001) were associated with tooth decay. However, the proportion of teeth with calculus deposition (in relation to observed teeth) was significantly higher among the population buried in tumuli (Z = 3.18, P = 0.001), although no differences were observed when the proportion of antemortem lost teeth and alveoli with periodontal disease were compared among people buried in tumuli and in caves, but women showed significantly lower proportions of alveoli with periodontal disease and antemortem tooth decay. These data suggest that the population buried in caves had a different dietary pattern to that of those buried in tumuli, since calculus deposition -more frequent in the latter-may be related to the consumption of proteins. The results also point to the existence of differences in diet between men and women.     

The Ba/Sr ratio,carious lesions,and dental calculus among the population buried in the church La Concepción (Tenerife,Canary Islands)

Certain trace elements may accumulate in bone in relation to dietary habits, so some of them are of interest in paleodietary analysis. This is the case with strontium (Sr) and barium (Ba), whose potential value as paleodietary indicators is enhanced by their relatively inert metabolic behaviour. The presence of carious lesions may indicate consumption of sugar and vegetables, whereas the etiology of dental calculus deposition is multifactorial, although some authors consider this as an indicator of protein consumption. Based on these facts we analysed (1) Ba, Sr, and calcium (Ca) content of inner cortical bone obtained from the ramus mandibularis, by atomic absorption spectrophotometry, (2) presence of teeth with carious lesions, and (3) presence of teeth with calculus deposition in 62 mandibles. All samples were obtained from the church La Concepción, an 18th century burial place in Tenerife. Gender was assessed by analysing genetic expression of amelogenin in some cases (14), and by inspection of pelvic bones when available (41 cases). We found (1) Carious lesions in 32 cases, and dental calculus, in 39; no association was observed between sex and presence of dental caries or calculus deposition, nor between the sex and the proportion of carious teeth nor the proportion of teeth with calculus deposition; (2) people buried near the altar (priests and individuals of the highest social class) showed a significantly higher proportion of teeth with dental calculus deposition (χ² = 5.36, p = 0.021); (3) bone Sr and bone Ba were significantly higher than the values observed in a control group of 10 modern omnivorous individuals; the lowest Sr values were observed among people buried near the altar; and (4) the Ba/Sr ratio was directly related with the proportion of teeth with carious lesions. These data suggest that there were differences in dietary pattern among the individuals belonging to different social classes; overall, consumption of vegetables was widespread, as shown by the high proportion of carious lesions, in relation with raised Ba/Sr ratio, whereas consumption of marine products was scarce.     

Teeth of juvenile woodchucks as seasonal indicators on archaeological sites

The woodchuck, Marmota monax, a burrowing scuirid of eastern North America, was a common food animal of prehistoric peoples. Since the species has a single, brief birthing period all juveniles are at a comparable stage of development at a given time. Widths of the continuously growing incisors, development of the cheek teeth and alveoli, and loss of deciduous teeth have been determined from a sample with known dates of collection. These data are compared to juvenile woodchuck remains from an archaeological site to determine season of kill.     

Refining the Quadratic Crown Height Method of age estimation: do elk teeth wear quadratically with age?

Teeth are the basis for the best methods for estimating the age-at-death of archaeological and paleontological faunal remains, because they change by eruption and wear throughout an individual's life and because they preserve well. However, age-at-death can be difficult to estimate when teeth are isolated or when no known-age reference sample is available. For these reasons, researchers developed the Quadratic Crown Height Method (QCHM), a set of quadratic formulae that can be used to predict age-at-death from tooth crown height, when unworn crown height and the ages when the tooth erupts and when its crown height should reach zero can be estimated. Previous tests of the QCHM suggest that modified equations could improve the method. Here, we use crown height measurements on a sample of 226 known-age Rocky Mountain elk (Cervus elaphus) to perform such modifications. We adjust the age at which each tooth type's crown height reaches zero from the species' potential ecological longevity or average maximum life span to an age that we empirically estimate for each tooth type. We also empirically assess whether for different elk teeth the exponent in the QCHM formula is actually equal to 2; it is for M1, but for P4 it is about 1, indicating a roughly linear relationship. The exponents for M2 and M3 are intermediate, being closer to 1.5. Because different teeth wear at different rates and wear completely away at different ages, we recommend that researchers use the modified equations provided here to estimate age-at-death for samples of Cervus elaphus.     

Biochemical and physical correlates of DNA contamination in archaeological human bones and teeth excavated at Matera,Italy

The majority of ancient DNA studies on human specimens have utilised teeth and bone as a source of genetic material. In this study the levels of endogenous contamination (i.e. present within the sample prior to sampling for the DNA analysis) are assessed within human bone and teeth specimens sampled from the cemetery of Santa Lucia alle Malve, Matera, Italy. This site is of exceptional interest, because the samples have been assayed for 18 measures of biochemical and physical preservation, and it is the only one identified in a study of more than 107 animal and 154 human bones from 43 sites across Europe, where a significant number of human bones was well preserved. The findings demonstrate several important issues: (a) although teeth are more resilient to contamination than bone, both are readily contaminated (presumably through handling or washing), and (b) once contaminated in this way, both are difficult (if not impossible) to decontaminate. Furthermore, although assessed on bone samples, several of the specific biochemical and physical characteristics that describe overall sample preservation, levels of microbial attack and related increases in sample porosity directly correlate with the presence of observable contamination in both bone and teeth samples from individual samples. While we can only speculate on the cause of this relationship, we posit that they provide useful guides for the assessment of whether samples are likely to be contaminated or not.     

Measuring Root Dentine Translucency in Human Teeth of Varying Antiquity

Many workers have calibrated human root dentine transparency (RDT) as a linear regression on age. It is now regarded as a well-established means of estimating age at death in modern human material. Similar applications in archaeological material have not yet been developed. The aim of this study was to establish a standard protocol for measuring RDT which was derived from previous methods and which could be applied to teeth of unknown and varying antiquity. An initial study on two archaeological populations determined the choice of tooth to study and a second study, using expendable teeth (of unknown age and origin), evaluated various techniques of specimen preparation and examination. Findings from the pilot study indicated that the lower canine was the tooth of choice. From the second study it was observed that archaeological teeth could only be sectioned if they had first been infiltrated and embedded in methyl methacrylate. The optimal section thickness was found to be 150 μm and no benefit was gained by staining. Inter-observer reliability tests showed significant differences in repeated measures of RDT in intact teeth, which were not borne out when sectioned teeth were used. Intra-observer reliability was maintained for measurements in both intact and sectioned teeth. These findings have been used to establish a standard protocol for application to human teeth of any depositional phase to estimate the dental age at death of that individual.     

Polish economic policy at the time of détente, 1966–78

This article focuses on Polish economic policy during the détente era to explore Poland's growing connection with the West as well as assesses the importance of domestic and external factors in influencing the choices of the Polish ruling elite. The two party first secretaries of the period, Gomu?ka and Gierek, were often opposed to each other, and the merit of Poland's opening up to the West is usually attributed to the second. By analysing Gomu?ka's and Gierek's leadership respectively, the author appraises the different ideas that characterised their economic policy, as well as the domestic and external constraints they faced, in order to assess the limits and flaws of their attempts at integrating the country into the world economy. This article offers a double reappraisal of the Polish leaderships' policies. First, it demonstrates that the economic opening up to the West had already started in the 1960s under Gomu?ka, despite limited East–West contacts at the time, and was driven by a proactive Polish government. Second, it downsizes the success of Gierek's economic policy and shows that it was mostly merely reactive to domestic pressure and foreign trends; its shortsightedness got Poland into the trap of spiralling indebtedness and irremediable social discontent with the regime.     

Remains of a Late Cretaceous pterosaur from the Molecap Greensand of Western Australia

Pterosaur remains are very rare in Australasia and especially in Upper Cretaceous strata. Thus, the discovery of a jaw fragment from the Cenomanian–Coniacian Molecap Greensand near Gingin in Western Australia represents an important new stratigraphical occurrence for the region. Although the teeth are not preserved, the presence of labio-lingually compressed alveoli that are anterolaterally oriented, variable in shape/size (inferring heterodonty) and very widely spaced is reminiscent of ornithocheirids—a geographically cosmopolitan clade of predominantly Early Cretaceous pterodactyloids. If correct, this identification could extend the known range of Ornithocheiridae through to the Late Cretaceous in the Southern Hemisphere.     

试论中西历史文化之差异对博物馆的影响

博物馆是晚清国人面临民族危难,奋力图强时,伴随着向西方学习的热潮而被引进中国的舶来品。文化的整体性不能被人为割裂,博物馆在西方能够产生并获得发展的社会历史背景和文化土壤,其中某些部分确实是我们的历史传统文化所缺失的,诸如民主意识和制度的确立;用财富换取社会地位的价值导向;具有世界性、现实性、视觉冲击感强、易于交流的藏品;需要以物辅助完成的历史教育、宗教敬畏、科学实践和探索等等。这些部分的缺失,在某种程度上可以作为博物馆在我国公共生活中参与程度始终不高的一部分原因。     

Identification of Areca catechu (Betel Nut) Residues on the Dentitions of Bronze Age Inhabitants of Nui Nap,Northern Vietnam

The dentitions of 31 individuals excavated from the Bronze Age site Nui Nap, Thanh Hoa province, Vietnam were examined for the presence of Areca catechu (betel nut) residues. The chief investigatory method involved GC/MS analysis of a dark reddish-brown stain commonly observed on the labial aspect of the anterior teeth of individuals from this site. The results of this work indicate that these teeth were stained by way of betel nut. Enamel surface morphology and the distribution of staining suggests purposeful application of betel nut residues to the teeth, perhaps for aesthetic reasons.