Showing posts with label Scotland. Show all posts
Showing posts with label Scotland. Show all posts

Saturday, 10 February 2024

Ceoptera evansae: A new species of Darwinopteran Pterosaur from the Middle Jurassic of the Isle of Skye.

Pterosaurs first appear in the fossil record in the Late Triassic, and persist till the end of the Cretaceous. During this time three basic morphotypes are found. The Rhamphorhynchoids are present from the Late Triassic till the Late Jurassic, and are considered to be a paraphyletic group from which all non-Rhamphorhynchoid Pterosaurs are descended. The highly derived Late Jurassic-End Cretaceous Pterodactyloids, are assumed to be a monophyletic group. Between these lie the Late Jurassic Darwinopterans; the Darwinopterans and Pterodactyloids are thought to comprise a single monophyletic clade, the Monofenestrata, although it is unclear if the Darwinopterans are a polyphyletic group of basal Monofenestratans from which the Pterodactyloids are descended, or whether they are a monophyletic group forming a separate branch of the Monofenestratan family tree.

Pterosaurs had delicate skeletons, made up of numerous elongate, thin bones. This is an excellent morphology for a flying Animal, but hampers the chances of that Animal's remains from being fossilised. Thus, the majority of known Pterosaur fossils come from a small number of Konservat Lagerstätten. The excellent preservation found at these sites has given us a good understanding of Pterosaur anatomy, functional morphology, and reproduction, but because their distribution in time is rather uneven, give us a rather limited perspective on the group's evolution and history. The majority of Konservat Lagerstätten date from two periods, the Late Jurassic and Middle Cretaceous, leaving us with some large gaps in which little is known about the diversity of Pterosaurs. This includes the late Early and Middle Jurassic, an interval of about 20 million years on which almost no Pterosaurs are known. The most abundant deposit from this period is the Taynton Limestone Formation of Oxfordshire, England, but the remains extracted from this deposit comprise almost exclusively isolated, and often fragmentary, bones, telling us little more than that Pterosaurs were present. Isolated Pterosaur bones are also known from the Oxford Clay, albeit in lower abundance. Fragmentary remains are also known from Kyrgyzstan, Mongolia, and China during this interval, though deposits from Argentina and China previously thought to have been of Middle Jurassic origin, from which a number of Pterosaur have been described. have recently been re-evaluated as being younger or older. 

In 2022 a Middle Jurassic Rhamphorhynchine Pterosaur, Dearc sgiathanach, was described from the Isle of Skye, Scotland, and in 2023 a partial non-Pterodactyloid Pterosaur was described from the same location. These, along with a possible Aurognathid from Mongolia, are currently the only known articulated Pterosaur skeletons from the Middle Jurassic.

In a paper published in the Journal of Vertebrate Paleontology on 5 February 2024, Elizabeth Martin-Silverstone of the Palaeobiology Research Group at the University of Bristol, David Unwin of the Centre for Palaeobiology and Biosphere Evolution and School of Museum Studies at the University of Leicester, Andrew Cuff of the Human Anatomy Resource Centre at the University of LiverpoolEmily Brown of the Fossil Reptiles, Amphibians, and Birds Section at the Natural History Museum and the School of Geography, Earth & Environmental Sciences at the University of Birmingham, Lu Allington-Jones of the Conservation Centre  at the Natural History Museum, and Paul Barrett, also of the Fossil Reptiles, Amphibians, and Birds Section at the Natural History Museum, describe a new species of Darwinopteran Pterosaur from the Middle Jurassic of the Isle of Skye.

The new species is named Ceoptera evansae, where 'Ceoptera' derives from 'cheò' or 'ceò' (pronounced ‘ki-yo’) the Gaelic word for 'mist', in reference to the Gaelic name for the Isle of Skye, Eilean a’Cheò, or Isle of Mist, and '-ptera' the Greek for 'wing', and 'evansae' honours Susan Evans of University College London, 'for her many years of anatomical and paleontological research, in particular on Skye', and for introducing Martin-Silverstone et al. to the locality where the specimen from which the species is described was found.

HMUK PV R37110, the holotype of Ceoptera evansae, approximately as it was found (top) and by CT reconstruction with elements (bottom). Abbreviations: c, coracoid; cv, caudal vertebra; dsc, distal syncarpal; dv,  dorsal  vertebra; fe,  femur; m,  manual-phalanx; mc,  metacarpal; mt,  metatarsal; p, pedal-phalanx; pe, pelvis; ph, phalanx; psc, proximal syncarpal; r, rib; ra, radius; s, scapula; st, sternum; tf, tibia +fibula; ul, ulna; v, vertebra; w, wing-phalanx. Martin-Silverstone et al. (2024).

Ceoptera evansae can be distinguished from all other Pterosaurs by two features: (1) the presence on the distal (sternal) portion of the coracoid shaft of a well-developed, elongate, narrow, sub-rectangular bony flange (probably a site for insertion of the sternocoracoideus muscle) with an irregular ‘wavy’ free margin, which extends proximally for almost one-quarter of the length of the coracoid; and (2) the lateral surface of the posterior, dorsally expanded, portion of the post-acetabular process of the ilium bears a prominent depression divided in two by a low, rounded vertical ridge.

Reconstruction of the right scapulocoracoid of Ceoptera evansae (NHMUK PV R37110), made from CT scans in (A) lateral and (B) medial views. (C) Reveals a close-up of the expanded sub-triangular brachial flange of the coracoid, one of the diagnostic characters of this taxon. Abbreviations: acc, acrocoracoid process; afs, articular facet for sternum; bf, brachial flange; c, coracoid; cf, coracoid flange; gl, glenoid; s, scapula; sde, distal expansion of scapula. The top scale bar is for (A) and (B). Martin-Silverstone et al. (2024).

Ceoptera evansae is calculated to have had a wingspan of about 1.6 m. Determining the maturity of Pterosaurs can be difficult, as the order in which the fusion of bones occurred seems to have been highly individualistic, often not following the same pattern in members of the same species. Nevertheless, the pelvic plates, syncarpals, and tibia-fibula of Ceoptera evansae are fully fused, probably indicating that this was a mature individual.

Skeletal  of Ceoptera  evansae (NHMUK PV R37110), showing the material that is present (top, with greyed bones indicating partially preserved elements) and an artist’s  impression of what the entire skeleton would have looked like if complete. Mark Witton in Martin-Silverstone et al. (2024).

A phylogenetic analysis was carried out including Ceoptera evansae along with previously described Pterosaurs. This recovered the Darwinoptera as a monophyletic clade, forming a sister group to the Pterodactyloids, although this is not yet sufficiently statistically strong to assume that later discoveries will not change this reconstruction.

Reduced strict consensus tree of 2890 most parsimonious trees (tree lengths = 553; Retention Index = 0.779, Consistency Index = 0.360, with bootstrap/Bremer support values for each node) showing Ceoptera evansae as a basally branching Monofenestratan (M) Pterosaur within Darwinoptera (D). Silhouettes from top to bottom of: Preondactylus; Jeholopterus; Rhamphorhynchus; Darwinopterus; Ctenochasma; Nyctosaurus; Germanodactylus; and Quetzalcoatlus. Martin-Silverstone et al. (2024).

Ceoptera evansae is the fourth known articulate Pterosaur from the Middle Jurassic, and the second described species. The interpretation of Ceoptera evansae as a member of the Darwinoptera shows that this group was not, as was implied by the previously available evidence, restricted to the Late Jurassic of East Asia, but had a much wider distribution both geographically and chronologically. Furthermore, the addition of Ceoptera evansae to the Pterosaur phylogenetic tree implies that the Darwinoptera are not simply a polyphyletic basal group of Monofenestratans, but rather a distinct clade forming a sister taxon to the Pterodactyoidea.

Life reconstruction of Ceoptera evansae. Mark Witton in Martin-Silverstone et al. (2024).

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Saturday, 3 February 2024

Record number of breeding Eurasian Cranes in the UK in 2023.

In 2023 a record number of Eurasian Cranes, Grus grus, were observed breeding in the UK, with eighty observed pairs, the highest number seen since the species was re-introduced in the 1970s. Eurasian Cranes were once abundant in the UK, but a combination of heavy hunting and the drainage of wetlands to create new agricultural land led to the species becoming locally extinct in the sixteenth century.

A pair of Eurasian Crans, Grus grus, during a courtship dance. RSPB.

While Cranes dissapeared as a resident species, occasional individuals were observed in the East of England in spring and autumn, during their annual migration between their summer breeding grounds in Europe (almost certainly Scandinavia for these Birds) and their wintering grounds in Africa. Then, in 1979, a single pair was observed to remain in the UK, breeding on Hickling Broad in Norfolk. From this point on a growing number of breeding pairs of Cranes were observed on the Norfolk Broads, with the Birds slowly expanding their range to reach Suffolk, Cambridgeshire, and South Yorkshire in England, as well as parts of Aberdeenshire in Scotland.

In addition to this, a reintroduction program was set up on the Somerset Levels in the West of England in the 2010s, with eggs collected from Brandenberg in Austria being incubated and  raised in captivity between 2010 and 2014, before being released onto the Levels. Cranes were first observed breeding in Somerset in 2015, although breeding remained slow their for some years, possibly because the Birds were hand-reared, which can hamper the ability of Birds to acquire courting and chick-rearing skills, but from 2021 onwards the Somerset population began to breed at similar rates to Cranes elsewhere in the UK. In 2022, twenty six pairs of cranes were observed breeding on the Somerset levels, out of a total UK population of 69 breeding pairs of the Birds.

A young Eurasian Crane, Grus grus, in flight on Sutton Fen in Somerset, England. RSPB.

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Saturday, 20 August 2022

Glasgow Life formerly hands back seven items to India.

Glasgow Life, the body which, amongst other things, overseas museums in the Scottish city, has agreed to return seven items taken from India during the colonial period. Six of the objects are believed to have been stolen from shrines and temples in Kanpur, Kolkata, Gwalior, Bihar and Hyderabad, while the seventh, a 14th century ceremonial tulwar (sword), was stolen from the Nizam of Hyderbad by his prime minister in 1905, and sold to General Sir Archibald Hunter, the then Commander-in-Chief of the Bombay Command of the Indian Army.

A fourteenth century ceremonial tulwar returned to the Government of India in a ceremony in Glasgow this week. Glasgow Life.

The objects, currently held by the Kelvingrove Art Gallery and Museum, are the latest in a series of items returned to other countries from Glasgow, which started in 1998 with the return of of a Ghost Shirt to the Lakota Nation. The latest items are being returned following following a meeting of Glasgow City Council in April this year (2022), in which a recommendation by the Working Group for Repatriation and Spoliation was accepted. The objects were formerly given to the acting Indian High Commissioner, Sujit Gosh, at a ceremony at the Kelvingrove Museum and Art Gallery on 19 August 2022. Other objects due to be repatriated following the April meeting include 19 'Benin Bronzes' (items looted from the city of Benin in modern Edo State, Nigeria, during a British military action in 1895), and 25 items belonging to the Cheyenne River Sioux and Oglala Sioux tribes of South Dakota, believed to have been taken from the dead following the Wounded Knee Massacre.

A ceremony at the Kelvingrove Museum and Art Gallery in Glasgow on 19 August 2022, in which items in the museum's collection believed to have been stolen from sites in India were formally returned to the Indian High Commissioner. BBC.

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Tuesday, 19 July 2022

Understanding the incorporation of older Human bodyparts into Bronze Age burials in Britain.

Improvements in dating techniques have led archaeologists to conclude that many artefacts placed in graves in Bronze Age Britain were already old when they were deposited. This possibly made them heirloom objects buried with people of significant standing, and retained till that point as an indicator of relationships to an older generation. Burials from this period also frequently include partial Human remains as well as the main burials, which raises the prospect that these objects too might have been heirloom objects prior to their burial.

Partial remains, including articulated and disarticulated fragments of bodies, are frequent occurrences in Chalcolithic and Early Bronze Age burials in Britain, and have traditionally been interpreted as evidence for the disturbance of earlier remains at sites which were re-used due to some spiritual significance. From about 2100 BC onwards, the cremation of remains prior to burial became the predominant funerary practice, although these cremation burials appear to have often only comprised fragments of the deceased, and on occasion fragments of more than one individual.

In a paper published in the European Journal of Archaeology on 25 May 2022, Joanna Brück of the School of Archaeology at University College Dublin, and Thomas Booth of the Skoglund Laboratory at the Francis Crick Institute, explore the possibility that the partial remains found in many Bronze Age British burials may be the result of the deliberate placement of these remains as artefacts in their own right, rather than the accidental disturbance of earlier remains.

A number of recent studies have found evidence of bodies in Bronze Age tombs in Britain being mummified before they were deposited. The most famous of these is the mummy from Cladh Hallan on South Uist, which was deposited beneath the floor of a Late Bronze Age/Early Iron Age roundhouse, but the practice has also been recorded from Chalcolithic and Early Bronze Age tombs. It is therefore not unreasonable to wonder if partial remains, articulated, disarticulated or cremated, from Bronze Age tombs in Britain might also have been mummified prior to their placement within the burial sites.

Brück and Booth collated 81 radiocarbon dates from fifteen graves at thirteen different locations; sixty four of these were from previous studies and seventeen are new to this publication. Of the thirteen burial sites, eleven were Chalcolithic or Early Bronze Age in origin. Eleven of the graves contained only unburnt bone, while the remaining four contained cremated remains. In the case of graves containing unburnt bones from both whole and partial bodies, the whole skeletons were used to provide an assumed date of burial, while other remains were dated separately and compared to these. In the case of graves containing cremated remains, each bone was dated separately. All but two of the graves were modern excavations, with osteological examination of the site being used to exclude the possibility of bones from the same individual being dated. Two of the sites included in the study were the subject of earlier excavations, though in both cases Brück and Booth are confident that the records provided by the archaeologists who carried out these digs were good enough to prevent double-sampling of the same individuals.

Bones which can be shown to have been old at the time of their burial could have been placed deliberately or accidentally, but the high proportion of burials in which older bones are incorporated makes accidental inclusion unlikely, as would any consistent relationship between the age of the main burial and the age of other bones included within a grave. Brück and Booth's data suggests that many of the partial remains incorporated into Bronze Age burials in Britain are about two generations older than the main burials; i.e. they had apparently been looked after elsewhere for decades, but not centuries. Other partial remains incorporated into burials showed no age difference to the main burial, but it is still possible that they were older, just not sufficiently so for the techniques used to detect the difference. 

Brück and Booth note that a high proportion of seafood in a persons diet can have an impact on the isotopic signature of their bones, but also observe that numerous previous studies have suggested that seafood was at most a very minor component of the British Bronze Age diet.

Histological examination of bones can also tell us a great deal about how they are treated after death. When individuals are buried in a dry, but well aerated, environment (such as that of most Bronze Age tombs), their bones will tend to suffer a great deal of bacterial bioerosion. On the other hand, bones of individuals who are prepared in some way prior to burial in the same environment, for example by mummification or excarnation (removal of the flesh from the bones), will show much less bone damage.

Seven of the thirteen sites examines were found to contain partial remains significantly older than the main burials. These remains all show less bioerosion than the main burials, suggesting that they were subjected to different treatment prior to their incorporation within the graves, and that this different treatment had begun immediately after death. 

At one site, Melton Quarry in East Yorkshire, the disarticulated and incomplete remains of an infant were found between the legs and torso of a complete and articulated adult. Radiocarbon dates obtained from the two sets of remains showed that the infant was in fact probably between 189 and 348 years older than the adult, and had relatively low levels of bioerosion to its bones, suggesting that the child had been stripped of their flesh shortly after death. Brück and Booth suggest that this infant may then have been kept in some sort of organic bag, possibly worn by a person, until the time of their eventual burial. 

Another example comes from a slab-lined grave found on the Cnip Headland on the Isle of Lewis. This grave contained one set of incomplete and partially articulated remains, thought to be those of an adolescent male, as well as the disarticulated remains of at least two adults. The adolescent male was placed on his right side, and it is thought that he was in an advanced state of putrefaction when he was buried; several vertebrae, the left fibula, and the right humorous were all out of position, suggesting that these parts of the body were skeletallised by the time burial occurred. There were also spaces between the head and torso, and the torso and lower body, which suggest the individual may have been in several pieces. However, the bones of the left hand are well articulated, which makes it likely that the hand was intact and fleshed at the time of deposition. The right arm, and both feet, are completely missing. The bones of this individual show little bioerosion, which may imply he was excarnated and then buried before complete skeletonisation occurred. However, a disarticulated bone from a layer depositionally below the adolescent produced a younger radiocarbon age, implying that his bones were already old when they were placed into the tomb. It is possible that the remains had been buried elsewhere and then excavated and placed in the Cnip Headland tomb, however calculations made using the OxCal radiocarbon calibration program suggest that between three and 82 years had passed between the death of the youth and his burial in the tomb, and again his bones show relatively low levels of bioerosion, suggesting that some form of treatment of the remains happened soon after death.

Cnip Headland, Isle of Lewis: plan of the partially articulated burial. Brück & Booth (2022).

Another burial of note is that at Windmill Fields in North Yorkshire. Here the primary burial is that of an adult woman, whose skeleton was articulate but heavily bioeroded, consistent with her having been buried whole and fully fleshed. In front of this individual had been stacked the disarticulated remains of another three individuals, an adult male, an adult female, and a probable adolescent female. Approximate dates were obtained from the crania of the two adults, suggesting that they are between 59 and 179 years older than the principle burial. Close to this burial was a pit with dark staining, consistent with a wooden structure such as a coffin having once been present. Further disarticulated bones were found within this structure, which were found to be of a similar age to the two crania, suggesting that this was the original location of the disarticulated remains found with the main burial.

Windmill Fields, Ingleby Barwick, Stockton-on-Tees: inhumation burial accompanied by a carefully arranged stack of disarticulated bone. Tees Archaeology in Brück & Booth (2022).

It has been known for a long time that Bronze Age burial chambers in Britain were frequently reopened to place additional remains within them, and more recently it has also become clear that remains were also removed from them. 

The South Dumpton Down site in Kent contains two complete individuals buried in the Early Bronze age, one of which is also accompanied by a detached Human mandible. This mandible was not found to be anonymously older than the two intact individuals, but showed a level of decomposition which suggests that it was removed from a body that had died some time before. It is unclear whether this implies removal from a tomb of from remains kept elsewhere, but the revisiting of burials is known to have occurred in this area. One nearby site consists of a shaft with five bodies on it, which had been deposited sequentially. Several of these bodies were missing their skulls, suggesting that pieces of the skeletons were being removed as well as new bodies added. It is quite possible that the mandible was removed from one of these bodies, although if they are less than decades older than the other burial the dating technique used would be unable to detect the age difference.

A pit at Cotswold Community near Ashton Keynes in Wiltshire yielded fragments of burned bone from both Humans and Animals, as well as pieces of beaker pottery, charcoal, burnt stone and plant remains. Dates were obtained from a fragment of Human femur and a piece of Animal bone, with the femur proving to be between five and 175 years older than the Animal. It has been suggested that such pits represent settlements, due to the presence of possible domestic contents (charcoal, burnt Animal remains, pottery fragments), but these sites could also represent locations revisited periodically, possibly for annual festivals or other such events. If that is the case then it is also quite possible that the remains, or partial remains, of the dead might have been brought to these sites, either specifically, or as part of a wider pattern of carrying portions of the dead with a semi-mobile community. 

Analysis of the locations examined by Brück and Booth suggests that certain bones from grave sites may have been predominantly chosen for redeposition elsewhere, notably long limb-bones and skulls, However, they also caution that their sample size is small, and for the most part they are reliant on data collected by other archaeologists, who were not looking for data on this topic.

The comparison of burned and unburned bone using isotope dating methods is problematic, and Brück and Booth have sought to avoid this, including only four sites with burned bone in their study. Two of these sites again produced anonymously old bones, and although Brück and Booth are less confident of these findings, this does appear consistent with the data from non-cremation burials.

The Trelowthas burial in Cornwall comprises a stone cist filled with cremated bones from numerous individuals. The site also contained an urn containing further cremated remains, from at least two individuals, which appears to have been placed their at a later date. However, analysis of the remains in the urn suggests that they were between three and 72 years older than the other remains. Brück and Booth believe this is indicative of these remains being kept elsewhere between their cremation and their eventual placement within the tomb, possibly in an environment where they would be encountered, and possibly even handled, by the living on a regular basis.

Another pit burial was found in the middle of a stone circle at Whitton Hill in Northumberland. This yielded 21.6 kg of bone from at least 24 individuals, including both adults and children. Only a single individual could be sexed, being found to be female. All of the bones here appear to have deposited in a single event, but the three bones which could be dated yielded different ages, with the older skeletons being between three and 115 and between three and 37 years older than the youngest skeleton. This has previously been interpreted as remains from an older cremation being accidentally incorporated into the deposit, although there is no evidence for the site having been revisited. Brück and Booth suggest that, in the light of evidence from other sites of a similar age, this is likely to be another example of older remains being deliberately included into a burial.

Brück and Booth present a large body of evidence for the incorporation of older remains into Bronze Age burials (and in particular Early Bronze Age) in Britain. Some of these appear to have been recovered from other grave sites specifically for re-internment within the new burial, but others show signs of practices such as mummification and excarnation not seen in primary burials, strongly suggesting that these bodies were treated differently from the time of death. Brück and Booth strongly suspect that this may have involved carrying portions of the dead with the living, possibly as a form of personal ornamentation, a practice known from some modern Human groups.

Brück and Booth suggest that the incorporation of older Human remains into Bronze Age burials is likely to indicate kinship between these remains and the principle occupiers of the graves, given that the occupants of other multi-occupancy grave-sites from the same period are typically related. 

This can be confirmed for one site, the Boscombe Bowmen burial at Boscombe Down in Wiltshire. Here several sets of adult and child remains were found together, with one adult male being accompanied by a bundle of bones representing the partial remains of at least four other individuals; two adult males, a subadult male and a juvenile. The bones in the bundle were principally long bones (i.e. arm or leg bones) from the left side of the body, but the skeleton also had two further crania and a partial mandible at his feet. DNA was recovered from both the male skeleton and one of the skulls (an adult male, 25-30 years old), enabling comparison of the relationships between these two individuals. This revealed that this two came from different lineages on their maternal side, but paternally were related, potentially being half-siblings, cousins, an uncle (or great uncle) and nephew, or grandfather (or great grandfather) and grandson. Unfortunately this skull was not radiocarbon dated, but one of the bones from the bundle, a femur, was, and was found to be significantly older than the intact skeleton.

The Boscombe Bowmen, Wiltshire: plan. Wessex Archaeology in Brück & Booth (2022).

Furthermore, strontium isotope analyses of tooth enamel from the skeleton and the two detached skulls suggests that all three undertook similar childhood journeys (strontium isotopes in water vary with local geology, and are incorporated in tooth and bone, providing a record of where people have lived). This implies that either all three had undertaken a the same journey as children, presumably together as living contemporaries, or all three had lived at a similar location away from the burial site, and been transported to that site after death. Either case would imply that the individuals involved shared some measure of shared life-history as well as a genetic relationship, and that this is likely to be reflected in the decision to bury them together.

Next Brück and Booth examined the age gap between partial remains found within graves and the principal occupants of those graves, finding that the principle occupants were on average about 95 years younger than the partial remains incorporated into their burials. They suggest this may represent a rough upper limit on the cultural memory of these older individuals as living people.

Not all ancient skeletons can be confidently sexed, particularly when dealing with partial remains, but of the partial remains incorporated into younger burials which could be identified, four were male and two female, implying that gender was not considered important when selecting remains for this purpose. Therefore, if these burials do represent the inclusion of remains of significant relatives with the recently deceased, then perception of who was a significant relative was apparently not related to gender.

The age of these older relatives also appears relatively unimportant. Of the examined remains for which an age could be determined, four were adults, one a subadult, one an adolescent, and one was an infant aged 2-4 months. Views on who represents an adult are known to have changed significantly over written history, making it unlikely that the views of Bronze Age Britons were identical to those of their modern descendants, but this is unlikely to have included babes-in-arms, making it plausible that age at death was unrelated to the status of individuals, when determining significant relationships.

Brück and Booth also note that perceived kinship is unrelated to biological relationships, which may present difficulties when establishing relationships between individuals within ancient burials.

Finally, Brück and Booth mention the burial of an adult male at Wilsford in Wiltshire, dated to between 1950 and 1970 BC, who was found to have among his grave goods a whistle made from a Human femur. It has been suggested that this was the grave of a shaman or other ritual specialist. Brück and Booth were able to date the whistle from this grave, finding it was not significantly older that the skeleton it was buried with, and therefore that the two individuals could have been known to one-another in life, as well as having both been known by the people who placed the whistle in the grave with the body. Though the relationship between the two individuals could not be determined, there are clearly other possibilities than the two being relatives, for example the whistle could have been made from the bone of another ritual specialist, possibly a previous holder of the same role within the community, or a person perceived as an enemy by the deceased or whole community.

Bronze Aged peoples are known to have valued goods made from certain materials, such as jet or amber, and treated these as being significant and powerful items. It is not an unreasonable supposition that goods made from Human remains would be seen as being similarly significant, and that the ownership of such items may have conferred social status. The incorporation of Human remains into burials as grave goods may also be an indication of status, although this is difficult to unravel from funeral practices intended to reflect ritual, familial, or emotional relationships between the dead. Brück and Booth note that the tendency to finally deposit relics made from Human remains at about the time when the individuals from whom these were made would have been disappearing from the collective memory of the group may also be significant.

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Tuesday, 1 February 2022

Fireball meteor over the Scottish Borders region.

Witnesses across much of England and Scotland, as well as the Netherlands, and parts of Wales, Belgium, and Ireland, have reported observing a bright fireball slightly before 6.50 pm local time (GMT) on Sunday 29 January 2022. The fireball is described as having moved from northeast to southwest, first appearing over the North Sea and vanishing over northern Northumbria, England. A fireball is defined as a meteor (shooting star) brighter than the planet Venus. These are typically caused by pieces of rock burning up in the atmosphere, but can be the result of man-made space-junk burning up on re-entry.

 
The 29 January 2022 meteorite seen from Koksijde in Belgium. American Meteor Society.
 
Objects of this size probably enter the Earth's atmosphere several times a year, though unless they do so over populated areas they are unlikely to be noticed. They are officially described as fireballs if they produce a light brighter than the planet Venus. The brightness of a meteor is caused by friction with the Earth's atmosphere, which is typically far greater than that caused by simple falling, due to the initial trajectory of the object. Such objects typically eventually explode in an airburst called by the friction, causing them to vanish as an luminous object. However, this is not the end of the story as such explosions result in the production of a number of smaller objects, which fall to the ground under the influence of gravity (which does not cause the luminescence associated with friction-induced heating).
 
Heat map showing areas where sightings of the meteor were reported (warmer colours indicate more sightings), and the apparent path of the object (blue arrow). American Meteor Society.
 
These 'dark objects' do not continue along the path of the original bolide, but neither do they fall directly to the ground, but rather follow a course determined by the atmospheric currents (winds) through which the objects pass. Scientists are able to calculate potential trajectories for hypothetical dark objects derived from meteors using data from weather monitoring services.
 
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Thursday, 8 April 2021

Fireball off the east coast of Scotland.

Witnesses across the Scotland, England, Northern Ireland, and parts of Denmark and Norway, have reported observing a bright fireball slightly after 8.35 pm local time (slightly after 7.35 pm GMT) on Saturday 3 April 2021. The fireball is described as having moved from north to south, appearing off the coast of Aberdeenshire and vanishing to the east of Angus. A fireball is defined as a meteor (shooting star) brighter than the planet Venus. These are typically caused by pieces of rock burning up in the atmosphere, but can be the result of man-made space-junk burning up on re-entry. 

 
The 3 April 2021 meteorite seen from the village of Fishburn in County Durham, England. David Alderson/American Meteor Society.
 
Objects of this size probably enter the Earth's atmosphere several times a year, though unless they do so over populated areas they are unlikely to be noticed. They are officially described as fireballs if they produce a light brighter than the planet Venus. The brightness of a meteor is caused by friction with the Earth's atmosphere, which is typically far greater than that caused by simple falling, due to the initial trajectory of the object. Such objects typically eventually explode in an airburst called by the friction, causing them to vanish as an luminous object. However, this is not the end of the story as such explosions result in the production of a number of smaller objects, which fall to the ground under the influence of gravity (which does not cause the luminescence associated with friction-induced heating).
 
 
Heat map showing areas where sightings of the meteor were reported (warmer colours indicate more sightings), and the apparent path of the object (blue arrow). American Meteor Society.

These 'dark objects' do not continue along the path of the original bolide, but neither do they fall directly to the ground, but rather follow a course determined by the atmospheric currents (winds) through which the objects pass. Scientists are able to calculate potential trajectories for hypothetical dark objects derived from meteors using data from weather monitoring services.

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