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Zooarchaeology

Zooarchaeology

Zooarchaeology is the study of animal remains from archaeological sites. The remains primarily consist of the hard parts of the body such as bones, teeth and shells. Such remains represent the food refuse of ancient populations as well as the use of animals transportation, decoration, or pets. Zooarchaeology helps complete our picture of the way of life of ancient people and the kind of environments they inhabited.

External link

- [http://www.zooarchaeology.com Zooarchaeology Home Page] Category:Archaeological sub-disciplines

Animal

:For the Muppet Show character, see Animal (Muppet). For the professional wrestler, see Joseph Laurinaitis.

- Porifera (sponges)
- Ctenophora (comb jellies)
- Cnidaria (coral, jellyfish, anenomes)
- Placozoa (trichoplax)
- Subregnum Bilateria (bilateral symmetry)
- Acoelomorpha (basal)
- Orthonectida (flatworms, echinoderms, etc.)
- Rhombozoa (dicyemids)
- Myxozoa (slime animals)
- Superphylum Deuterostomia (blastopore becomes anus)
- Chordata (vertebrates, etc.)
- Hemichordata (acorn worms)
- Echinodermata (starfish, urchins)
- Chaetognatha (arrow worms)
- Superphylum Ecdysozoa (shed exoskeleton)
- Kinorhyncha (mud dragons)
- Loricifera
- Priapulida (priapulid worms)
- Nematoda (roundworms)
- Nematomorpha (horsehair worms)
- Onychophora (velvet worms)
- Tardigrada (water bears)
- Arthropoda (insects, etc.)
- Superphylum Platyzoa
- Platyhelminthes (flatworms)
- Gastrotricha (gastrotrichs)
- Rotifera (rotifers)
- Acanthocephala (acanthocephalans)
- Gnathostomulida (jaw worms)
- Micrognathozoa (limnognathia)
- Cycliophora (pandora)
- Superphylum Lophotrochozoa (trochophore larvae / lophophores)
- Sipuncula (peanut worms)
- Nemertea (ribbon worms)
- Phoronida (horseshoe worms)
- Ectoprocta (moss animals)
- Entoprocta (goblet worms)
- Brachiopoda (brachipods)
- Mollusca (mollusks)
- Annelida (segmented worms) Animals are a major group of organisms, classified as the kingdom Animalia or Metazoa. In general they are multicellular, capable of locomotion and responsive to their environment, and feed by consuming other organisms. Their body plan becomes fixed as they develop, usually early on in their development as embryos, although some undergo a process of metamorphosis later on. Along with sponges, gastropods, emus, dolphins and all other animals, Homo sapiens sapiens meet all the criteria above for membership in the group of organisms known as animals and they do not meet the criteria of the other groups. Some humans often consider themselves separate from animals, not on the grounds of biology, but through the use of "other contexts". Whilst self-delusion may be a unique characteristic of the human species it is not cause for exclusion from the Kingdom Animalia. The name animal comes from the Latin word animal, of which animalia is the plural, and ultimately from anima, meaning vital breath or soul.

Characteristics

Aristotle divided the living world between animals and plants, and this was followed by Carolus Linnaeus in the first hierarchical classification. Since then biologists have begun emphasizing evolutionary relationships, and so these groups have been restricted somewhat. For instance, microscopic protozoa were originally considered animals because they move, but are now treated separately. Kingdom Animalia has several characteristics that set it apart from other living things. First, animals are eukaryotic. This separates them from the Kingdom Monera. Second, animals are multicellular, which separates them from Kingdom Protista. Third, they are heterotrophic, setting them apart from Kingdom Plantae and several plant-like protists. Finally, Kingdom Animalia consists of organisms without cell walls, which makes it unique compared to Kingdom Plantae, algae, and Kingdom Fungi.

Structure

With a few exceptions, most notably the sponges (Phylum Porifera), animals have bodies differentiated into separate tissues. These include muscles, which are able to contract and control locomotion, and a nervous system, which sends and processes signals. There is also typically an internal digestive chamber, with one or two openings. Animals with this sort of organization are called metazoans, or eumetazoans when the former is used for animals in general. All animals have eukaryotic cells, surrounded by a characteristic extracellular matrix composed of collagen and elastic glycoproteins. This may be calcified to form structures like shells, bones, and spicules. During development it forms a relatively flexible framework upon which cells can move about and be reorganized, making complex structures possible. In contrast, other multicellular organisms like plants and fungi have cells held in place by cell walls, so develop by progressive growth. Also, unique to animal cells are the following intercellular junctions: tight junctions, gap junctions, and desmosomes.

Reproduction and development

Nearly all animals undergo some form of sexual reproduction. Adults are diploid or occasionally polyploid. They have a few specialized reproductive cells, which undergo meiosis to produce smaller motile spermatozoa or larger non-motile ova. These fuse to form zygotes, which develop into new individuals. Many animals are also capable of asexual reproduction. This may take place through parthenogenesis, where fertile eggs are produced without mating, or in some cases through fragmentation. A zygote initially develops into a hollow sphere, called a blastula, which undergoes rearrangement and differentiation. In sponges, blastula larvae swim to a new location and develop into a new sponge. In most other groups, the blastula undergoes more complicated rearrangement. It first invaginates to form a gastrula with a digestive chamber, and two separate germ layers - an external ectoderm and an internal endoderm. In most cases, a mesoderm also develops between them. These germ layers then differentiate to form tissues and organs. Animals grow by indirectly using the energy of sunlight. Plants use this energy to turn air into simple sugars using a process known as photosynthesis. These sugars are then used as the building blocks which allow the plant to grow. When animals eat these plants (or eat other animals which have eaten plants), the sugars produced by the plant are used by the animal. They are either used directly to help the animal grow, or broken down, releasing stored solar energy, and giving the animal the energy required for motion. This process is known as glycolysis.

Origin and fossil record

Animals are generally considered to have evolved from flagellate protozoa. Their closest living relatives are the choanoflagellates, collared flagellates that have the same structure as certain sponge cells do. Molecular studies place them in a supergroup called the opisthokonts, which also include the fungi and a few small parasitic protists. The name comes from the posterior location of the flagellum in motile cells, such as most animal sperm, whereas other eukaryotes tend to have anterior flagella. The first fossils that might represent animals appear towards the end of the Precambrian, around 600 million years ago, and are known as the Vendian biota. These are difficult to relate to later fossils, however. Some may represent precursors of modern phyla, but they may be separate groups, and it is possible they are not really animals at all. Aside from them, most animal phyla with known phyla make a more or less simultaneous appearance during the Cambrian period, about 570 million years ago. It is still disputed whether this event, called the Cambrian explosion, represents a rapid divergence between different groups or a change in conditions that made fossilization possible.

Groups of animals

The sponges (Porifera) diverged from other animals early. As mentioned, they lack the complex organization found in most other phyla. Their cells are differentiated, but not organized into distinct tissues. Sponges are sessile and typically feed by drawing in water through pores all over the body, which is supported by a skeleton typically divided into spicules. The extinct Archaeocyatha, which have fused skeletons, may represent sponges or a separate phylum. Among the eumetazoan phyla, two are radially symmetric and have digestive chambers with a single opening, which serves as both the mouth and the anus. These are the Cnidaria, which include anemones, corals, and jellyfish, and the Ctenophora or comb jellies. Both have distinct tissues, but they are not organized into organs. There are only two main germ layers, the ectoderm and endoderm, with only scattered cells between them. As such, these animals are sometimes called diploblastic. The tiny phylum Placozoa is similar, but individuals do not have a permanent digestive chamber. The remaining animals form a monophyletic group called the Bilateria. For the most part, they are bilaterally symmetric, and often have a specialized head with feeding and sensory organs. The body is triploblastic, i.e. all three germ layers are well-developed, and tissues form distinct organs. The digestive chamber has two openings, a mouth and an anus, and there is also an internal body cavity called a coelom or pseudocoelom. There are exceptions to each of these characteristics, however - for instance adult echinoderms are radially symmetric, and certain parasitic worms have extremely simplified body structures. Genetic studies have considerably changed our understanding of the relationships within the Bilateria. Most appear to belong to four major lineages: # Deuterostomes # Ecdysozoa # Platyzoa # Lophotrochozoa In addition to these, there are a few small groups of bilaterians with relatively similar structure that appear to have diverged before these major groups. These include the Acoelomorpha, Rhombozoa, and Orthonectida. The Myxozoa, single-celled parasites that were originally considered Protozoa, are now believed to have developed from the Bilateria as well.

Deuterostomes

Deuterostomes differ from the other Bilateria, called protostomes, in several ways. In both cases there is a complete digestive tract. However, in protostomes the initial opening (the archenteron) develops into the mouth, and an anus forms separately. In deuterostomes this is reversed. In most protostomes cells simply fill in the interior of the gastrula to form the mesoderm, called schizocoelous development, but in deuterostomes it forms through evagination of the endoderm, called enterocoelic pouching. Deuterostomes also have a dorsal, rather than a ventral, nerve chord and their embryos undergo different cleavage. All this suggests the deuterostomes and protostomes are separate, monophyletic lineages. The main phyla of deuterostomes are the Echinodermata and Chordata. The former are radially symmetric and exclusively marine, such as sea stars, sea urchins, and sea cucumbers. The latter are dominated by the vertebrates, animals with backbones. These include fish, amphibians, reptiles, birds, and mammals. In addition to these, the deuterostomes also include the Hemichordata or acorn worms. Although they are not especially prominent today, the important fossil graptolites may belong to this group. The Chaetognatha or arrow worms may also be deuterostomes, but this is less certain.

Ecdysozoa

The Ecdysozoa are protostomes, named after the common trait of growth by moulting or ecdysis. The largest animal phylum belongs here, the Arthropoda, including insects, spiders, crabs, and their kin. All these organisms have a body divided into repeating segments, typically with paired appendages. Two smaller phyla, the Onychophora and Tardigrada, are close relatives of the arthropods and share these traits. The ecdysozoans also include the Nematoda or roundworms, the second largest animal phylum. Roundworms are typically microscopic, and occur in nearly every environment where there is water. A number are important parasites. Smaller phyla related to them are the Nematomorpha or horsehair worms, which are visible to the unaided eye, and the Kinorhyncha, Priapulida, and Loricifera, which are all microscopic. These groups have a reduced coelom, called a pseudocoelom. The remaining two groups of protostomes are sometimes grouped together as the Spiralia, since in both embryos develop with spiral cleavage.

Platyzoa

The Platyzoa include the phylum Platyhelminthes, the flatworms. These were originally considered some of the most primitive Bilateria, but it now appears they developed from more complex ancestors. A number of parasites are included in this group, such as the flukes and tapeworms. Flatworms lack a coelom, as do their closest relatives, the microscopic Gastrotricha. The other platyzoan phyla are microscopic and pseudocoelomate. The most prominent are the Rotifera or rotifers, which are common in aqueous environments. They also include the Acanthocephala or spiny-headed worms, the Gnathostomulida, Micrognathozoa, and possibly the Cycliophora. These groups share the presence of complex jaws, from which they are called the Gnathifera.

Lophotrochozoa

The Lophotrochozoa include two of the most successful animal phyla, the Mollusca and Annelida. The former includes animals such as snails, clams, and squids, and the latter comprises the segmented worms, such as earthworms and leeches. These two groups have long been considered close relatives because of the common presence of trochophore larvae, but the annelids were considered closer to the arthropods, because they are both segmented. Now this is generally considered convergent evolution, owing to many morphological and genetic differences between the two phyla. The Lophotrochozoa also include the Nemertea or ribbon worms, the Sipuncula, and several phyla that have a fan of cilia around the mouth, called a lophophore. These were traditionally grouped together as the lophophorates, but it now appears they are paraphyletic, some closer to the Nemertea and some to the Mollusca and Annelida. They include the Brachiopoda or lamp shells, which are prominent in the fossil record, the Entoprocta, the Phoronida, and possibly the Ectoprocta or moss animals.

History of classification

In Linnaeus' original scheme, the animals were one of three kingdoms, divided into the classes of Vermes, Insecta, Pisces, Amphibia, Aves, and Mammalia. Since then the last four have all been subsumed into a single phylum, the Chordata, whereas the various other forms have been separated out. The above lists represent our current understanding of the group, though there is some variation from source to source.

Usage of the word animal

In everyday usage animal refers to any member of the animal kingdom that is not a human being, and sometimes excludes insects (although including such arthropods as crabs). This confusion stems primarily from the familiarity with zoo animals, farm animals and pets, not from an analytical distinction between insects, humans and the rest of the animal kingdom.

Examples

Some well-known types of animals, listed by their common names:
- alpaca, ant, antelope, badger, bat, bear, bee, beetle, bird, bison, butterfly, cat, chicken, cockroach, coral, cow, deer, dinosaur, dog, dolphin, earthworm, elephant, elk, fish, fly, fox, frog, giraffe, goat, gorilla, hippopotamus, horse, human, iguana, jellyfish, kangaroo, lion, lizard, llama, lynx, monkey, mouse, nightingale, octopus, owl, ox, parrot, penguin, pig, quail, rabbit, rat, rhinoceros, salamander, scorpion, seahorse, shark, sheep, sloth, snake, spider, squid, starfish, tiger, turtle, urial, vole, whale, wolf, yak, zebra

References

External links

- [http://www.animool.com/animals/index.jsp Animals Search Engine]
- [http://www.wikianimals.com wikianimals.com] - Documenting the animal kingdom
- [http://tolweb.org/tree?group=Animals&contgroup=Eukaryotes Tree of Life]
- [http://www.arkive.org A Multimedia Database of Various UK or Endangered Species]
- [http://freepages.genealogy.rootsweb.com/~wakefield/animals.html Animals and Birds Names] - Large table of words: animal, collective, male, female, young, & home
- [http://www273.pair.com/med/words/animal_adjectives.htm English Animal Adjectives]
- [http://www.georgetown.edu/faculty/ballc/animals/animals.html Sounds of the World's Animals] - animal sounds in many languages
- [http://www.findsounds.com/ FindSounds - Search the Web for Sounds] - sound files including animal sound files
- [http://www.australianfauna.com/ Australian Animals]
- [http://www.animalreviews.com AnimalReviews] - animals reviewed and evaluated
- [http://animals.timduru.org/ The animal photo archive] - Photos of animals
- [http://www.wildlife-photo.org Photo gallery of animals pictures from the entire world.]
- [http://www.wildlife-photo.org/birds_list.htm Birds Name Check List in Latin, English, Russian and Hebrew.]
- [http://www.wildanimalsonline.com Wild Animals Online] - an online encyclopedia of wild animals - facts, photos Category:Animals zh-min-nan:Tōng-bu̍t ko:동물 ms:Haiwan ja:動物 simple:Animal th:สัตว์

Archeology

Archaeology or archeology (from the Greek words αρχαίος = ancient and λόγος = word/speech/discourse) is the study of human cultures through the recovery, documentation and analysis of material remains and environmental data, including architecture, artifacts, biofacts, human remains, and landscapes. The goals of archaeology are to document and explain the origins and development of human culture, understand culture history, chronicle cultural evolution, and study human behaviour and ecology, for both prehistoric and historic societies.

Ontology and definition

In the Old World, archaeology has tended to focus on the study of physical remains, the methods used in recovering them and the theoretical and philosophical underpinnings in achieving the subject's goals. The discipline's roots in antiquarianism and the study of Latin and Ancient Greek provided it with a natural affinity with the field of history. In the New World, archaeology is more commonly devoted to the study of human societies and is treated as one of the four subfields of Anthropology. The other subfields of anthropology supplement the findings of archaeology in a holistic manner. These subfields are cultural anthropology, which studies behavioural, symbolic, and material dimensions of culture; linguistics, which studies language, including the origins of language and language groups; and physical anthropology, which includes the study of human evolution and physical and genetic characteristics. Other disciplines also supplement archaeology, such as paleontology, paleozoology, paleoethnobotany, paleobotany, geography, geology, art history, and classics. Archaeology has been described as a craft that enlists the sciences to illuminate the humanities. Writing in 1948, the American archaeologist Walter Taylor asserted that "Archaeology is neither history nor anthropology. As an autonomous discipline, it consists of a method and a set of specialised techniques for the gathering, or 'production' of cultural information". Archaeology is an approach to understanding human culture through its material remains regardless of chronology. In England, archaeologists have uncovered the long-lost layouts of medieval villages abandoned after the crises of the 14th century and the equally lost layouts of 17th century parterre gardens swept away by a change in fashion. In downtown New York City archaeologists have exhumed the 18th century remains of the Black burial ground. Traditional Archaeology is viewed as the study of pre-historical human cultures; that is cultures that existed before the development of writing for that culture. Historical archaeology is the study of post-writing cultures. In the study of relatively recent cultures, which have been observed and studied by Western scholars, archaeology is closely allied with ethnography. This is the case in large parts of North America, Oceania, Siberia, and other places where the study of archaeology mingles with the living traditions of the cultures being studied. Kennewick_Man is an example of archaeology interacting with modern culture. In the study of cultures that were literate or had literate neighbours, history and archaeology supplement one another for broader understanding of the complete cultural context, as at Hadrian's Wall. Hadrian's Wall

Importance and applicability

Most of human history is not described by any written records. Writing did not exist anywhere in the world until about 5000 years ago, and only spread among a relatively small number of technologically advanced civilisations. In contrast Homo sapiens have existed for at least 200,000 years, and other species of Homo for millions of years (see Human evolution). These civilisations are, not coincidentally, the best-known; they have been open to the inquiry of historians for centuries, while the study of pre-historic cultures has arisen only recently. Even within a civilisation that is literate at some levels, many important human practices are not officially recorded. Any knowledge of the formative early years of human civilisation - the development of agriculture, cult practices of folk religion, the rise of the first cities - must come from archaeology. Even where written records do exist, they are invariably incomplete or biased to some extent. In many societies, literacy was restricted to the elite classes, such as the clergy or the bureaucracy of court or temple. The literacy even of an aristocracy has sometimes been restricted to deeds and contracts. The interests and world-view of elites are often quite different from the lives and interests of the rest of the populace. Writings that were produced by people more representative of the general population were unlikely to find their way into libraries and be preserved there for posterity. Thus, written records tend to reflect the biases of the literate classes, and cannot be trusted as a sole source. The material record is nearer to a fair representation of society, though it is subject to its own inaccuracies, such as sampling bias and differential preservation. In addition to their scientific importance, archaeological remains sometimes have political significance to descendants of the people who produced them, monetary value to collectors, or simply strong aesthetic appeal. Many people identify archaeology with the recovery of such aesthetic, religious, political, or economic treasures rather than with the reconstruction of past societies. This view is often espoused in works of popular fiction, such as Raiders of the Lost Ark, The Mummy, and King Solomon's Mines. When such unrealistic subjects are treated more seriously, accusations of pseudoscience are invariably levelled at their proponents (see Pseudoarchaeology, below). However, these endeavours, real and fictional, are not representative of the modern state of archaeology.

Goals

There is still a tremendous emphasis in the practice of archaeology on field techniques and methodologies. These include the tasks of surveying areas in order to find new sites, digging sites in order to unearth the cultural remains therein, and classification and preservation techniques in order to analyse and keep these remains. Every phase of this process can be a source of information. The goals of archaeology are not always the same. There are at least three broad, distinct theories of exactly what archaeological research should do. (These are beyond the scope of the present discussion, and are discussed at length below.) Nevertheless, there is much common ground.

Academic sub-disciplines

Main article: Archaeological sub-disciplines As with most academic disciplines, there are a very large number of archaeological sub-disciplines characterised by a specific method or type of material (e.g. lithic analysis, music, archaeobotany), geographical or chronological focus (e.g. Near Eastern archaeology, Medieval archaeology), other thematic concern (e.g. landscape archaeology), or a specific archaeological culture or civilisation (e.g. Egyptology).

Cultural resources management

Cultural resources management (CRM) (also called heritage management in Britain) is a branch of archaeology that accounts for most research done in the United States and much of that in western Europe as well. In the United States, CRM archaeology has been a growing concern since the passage of the National Historic Preservation Act of 1966 and most of the archaeology done in that country today proceeds from either direct or related requirements of that measure. In the United States, the vast majority of taxpayers, scholars, and politicians believe that CRM has helped to preserve much of that nation's history and prehistory that would have otherwise been lost in the expansion of cities, dams, and highways. Along with other statutes, this mandates that no construction project on public land or involving public funds may damage an unstudied archaeological site. The application of CRM in the United Kingdom is not limited to government-funded projects. Since 1990 PPG 16 has required planners to consider archaeology as a material consideration in determining applications for new development. As a result, numerous archaeological organisations undertake mitigation work in advance of (or during) construction work in archaeologically sensitive areas, at the developer's expense. Among the goals of CRM are the identification, preservation, and maintenance of cultural sites on public and private lands, and the removal of culturally valuable materials from areas where they would otherwise be destroyed by human activity, such as proposed construction. This study involves at least a cursory examination to determine whether or not any significant archaeological sites are present in the area affected by the proposed construction. If these do exist, time and money must be allotted for their excavation. If initial survey and/or test excavation indicates the presence of an extraordinarily valuable site, the construction may be prohibited entirely. CRM is a thriving entity, especially in the United States and Europe where archaeologists from private companies and all levels of government engage in the practice of their discipline. Cultural resources management has, however, been criticized. CRM is conducted by private companies that bid for projects by submitting proposals outlining the work to be done and an expected budget. It is not unheard-of for the agency responsible for the construction to simply choose the proposal that asks for the least funding. CRM archaeologists face considerable time pressure, often being forced to complete their work in a fraction of the time that might be allotted for a purely scholarly endeavour.

Field methods

Survey

A modern archaeological project often begins with a survey. Regional survey is the attempt to systematically locate previously unknown sites in a region. Site survey is the attempt to systematically locate features of interest, such as houses and middens, within a site. Each of these two goals may be accomplished with largely the same methods. Survey was not widely practiced in the early days of archaeology. Cultural historians and prior researchers were usually content with discovering the locations of monumental sites from the local populace, and excavating only the plainly visible features there. Gordon Willey pioneered the technique of regional settlement pattern survey in 1949 in the Viru Valley of coastal Peru, and survey of all levels became prominent with the rise of processual archaeology some years later. Survey work has many benefits if performed as a preliminary exercise to, or even in place of, excavation. It requires relatively little time and expense, because it does not require processing large volumes of soil to search out artefacts. (Nevertheless, surveying a large region or site can be expensive, so archaeologists often employ sampling methods.) It avoids ethical issues (of particular concern to descendant peoples) associated with destroying a site through excavation. It is the only way to gather some forms of information, such as settlement patterns and settlement structure. Survey data are commonly assembled into maps, which may show surface features and/or artefact distribution. The simplest survey technique is surface survey. It involves combing an area, usually on foot but sometimes with the use of mechanised transport, to search for features or artefacts visible on the surface. Surface survey cannot detect sites or features that are completely buried under earth, or overgrown with vegetation. Surface survey may also include mini-excavation techniques such as augers, corers, and shovel test pits. Aerial survey is conducted using cameras attached to aircraft, balloons, or even kites. A bird's-eye view is useful for quick mapping of large or complex sites. Aerial imaging can also detect many things not visible from the surface. Plants growing above a stone structure, such as a wall, will develop more slowly, while those above other types of features (such as middens) may develop more rapidly. Photographs of ripening grain, which changes colour rapidly at maturation, have revealed buried structures with great precision. Aerial survey also employs infrared, ground-penetrating radar wavelengths, and thermography. Geophysical survey is the most effective way to see beneath the ground. Magnetometers detect minute deviations in the Earth's magnetic field caused by iron artefacts, kilns, some types of stone structures, and even ditches and middens. Devices that measure the electrical resistivity of the soil are also widely used. Most soils are moist below the surface, which gives them a relatively low resistivity. Features such as hard-packed floors or concentrations of stone have a higher resistivity. Although some archaeologists consider the use of metal detectors to be tantamount to treasure hunting, others deem them an effective tool in archaeological surveying. Examples of formal archaeological use of metal detectors include musketball distribution analysis on English Civil War battlefields, metal distribution analysis prior to excavation of a nineteenth century ship wreck, and service cable location during evaluation. Metal detectorists have also contributed to the archaeological record where they have made detailed records of their results and refrained from raising artifacts from their archaeological context. In the UK, metal detectorists have been solicited for involvement in the Portable Antiquities Scheme. Regional survey in maritime archaeology uses side-scan sonar.

Excavation

Archaeological excavation existed when the field was still the domain of amateurs, and it remains the source of the majority of data recovered in most field projects. It can reveal several types of information usually not accessible to survey, such as stratigraphy, three-dimensional structure, and verifiably primary context. Modern excavation techniques require that the precise locations of objects and features, known as their provenance or provenience, be recorded. This always involves determining their horizontal locations, and sometimes vertical position as well. Similarly, their association, or relationship with nearby objects and features, needs to be recorded for later analysis. This allows the archaeologist to deduce what artefacts and features were likely used together and which may be from different phases of activity. For example, excavation of a site reveals its stratigraphy; if a site was occupied by a succession of distinct cultures, artefacts from more recent cultures will lie above those from more ancient cultures. Excavation is the most expensive phase of archaeological research. Also, as a destructive process, it carries ethical concerns. As a result, very few sites are excavated in their entirety. Sampling is even more important in excavation than in survey. It is common for large mechanical equipment, such as backhoes (JCBs), to be used in excavation, especially to remove the topsoil (overburden), though this method is increasingly used with great caution. Following this it is usual to hand-clean the exposed area with trowels or hoes to ensure that all features are apparent. The next task is to produce a site plan and then use it to help decide the method of excavation. Features dug into the natural subsoil are normally excavated in portions in order to produce a visible archaeological section for recording. Scaled plans and sections of individual features are all drawn on site, black and white and colour photographs of them are taken, and recording sheets are filled in describing the context of each. All this information serves as a permanent record of the now-destroyed archaeology and is used in describing and interpreting the site.

Post-excavation analysis

Once artefacts and structures have been excavated, or collected from surface surveys, it is necessary to properly study them, to gain as much data as possible. This process is known as post-excavation analysis, and is normally the most time-consuming part of the archaeological investigation. It is not uncommon for the final excavation reports on major sites to take years to be published. At its most basic, the artefacts found are cleaned, catalogued and compared to published collections, in order to classify them typologically and to identify other sites with similar artefact assemblages. However, a much more comprehensive range of analytical techniques are available through archaeological science, meaning that artefacts can be dated and their compositions examined. The bones, plants and pollen collected from a site can all be analysed (using the techniques of zooarchaeology, paleoethnobotany, and palynology), while any texts can usually be deciphered. These techniques frequently provide information that would not otherwise be known and therefore contribute greatly to the understanding of a site.

History of archaeology

Main article: History of archaeology The history of archaeology has been one of increasing professionalisation, and the use of an increasing range of techniques, to obtain as much data on the site being examined as possible. Excavations of ancient monuments and the collection of antiquities have been taking place for thousands of years, but these were mostly for the extraction of valuable or aesthetically pleasing artefacts. It was only in the 19th century that the systematic study of the past through its physical remains began to be carried out. Archaeological methods were developed by both interested amateurs and professionals, including Augustus Pitt Rivers and William Flinders Petrie. This process was continued in the 20th century by such people as Mortimer Wheeler, whose highly disciplined approach to excavation greatly improved the quality of evidence that could be obtained. During the 20th century, the development of urban archaeology and then rescue archaeology have been important factors, as has the development of archaeological science, which has greatly increased the amount of data that it is possible to obtain.

Archaeological theory

Main article: Archaeological theory There is no single theory of archaeology, and even definitions are disputed. Until the mid-20th century and the introduction of technology, there was a general consensus that archaeology was closely related to both history and anthropology. The first major phase in the history of archaeological theory is commonly referred to as cultural, or culture, history, which was developed during the late 19th and early 20th centuries. In the 1960s, a number of young, primarily American archaeologists, such as Lewis Binford, rebelled against the paradigms of cultural history. They proposed a "New Archaeology", which would be more "scientific" and "anthropological", with hypothesis testing and the scientific method very important parts of what became known as processual archaeology. In the 1980s, a new movement arose led by the British archaeologists Michael Shanks, Christopher Tilley, Daniel Miller, and Ian Hodder. It questioned processualism's appeals to science and impartiality and emphasised the importance of relativism, becoming known as post-processual archaeology. However, this approach has been criticised by processualists as lacking scientific rigour. The validity of both processualism and post-procuessualism is still under debate. Archaeological theory now borrows from a wide range of influences, including neo-Darwinian evolutionary thought, phenomenology, postmodernism, agency theory, cognitive science, Functionalism, gender-based and Feminist archaeology, and Systems theory.

Public archaeology

Early archaeology was largely an attempt to uncover spectacular artifacts and features, or to explore vast and mysterious abandoned cities. Such pursuits continue to fascinate the public, portrayed in books (such as King Solomon's Mines) and films (such as The Mummy and Raiders of the Lost Ark). Much thorough and productive research has indeed been conducted in dramatic locales such as Copán and the Valley of the Kings, but the stuff of modern archaeology is not so reliably sensational. In addition, archaeological adventure stories tend to ignore the painstaking work involved in modern survey, excavation, and data processing techniques. Some archaeologists refer to such portrayals as "pseudoarchaeology". Nevertheless, archaeology has profited from its portrayal in the mainstream media. Many practitioners point to the childhood excitement of Indiana Jones films and Tomb Raider games as the inspiration for them to enter the field. Archaeologists are also very much reliant on public support, the question of exactly who they are doing their work for is often discussed. Without a strong public interest in the subject, often sparked by significant finds and celebrity archaeologists, it would be a great deal harder for archaeologists to gain the political and financial support they require. In the UK, popular archaeology programmes such as Time Team and Meet the Ancestors have resulted in a huge upsurge in public interest. Where possible, archaeologists now make more provision for public involvement and outreach in larger projects than they once did. However, the move towards being more professional has meant that volunteer places are now relegated to unskilled labour, and even this is less freely available than before. Developer-funded excavation necessitates a well-trained staff that can work quickly and accurately, observing the necessary health and safety and indemnity insurance issues involved in working on a modern building site with tight deadlines. Certain charities and local government bodies sometimes offer places on research projects either as part of academic work or as a defined community project. There is also a flourishing industry selling places on commercial training excavations and archaeological holiday tours. Archaeologists prize local knowledge and often liaise with local historical and archaeological societies. Anyone looking to get involved in the field without having to pay to do so should contact a local group.

Pseudoarchaeology

Main article: Pseudoarchaeology. Pseudoarchaeology is an umbrella term for all activities that claim to be archaeological but in fact violate commonly accepted archaeological practices. It includes much fictional archaeological work (discussed above), as well as some actual activity. Many non-fiction authors have ignored the scientific methods of processual archaeology, or the specific critiques of it contained in Post-processualism. An example of this type is the writing of Erich von Däniken. His Chariots of the Gods (1968), together with many subsequent lesser-known works, expounds a theory of ancient contacts between human civilisation on Earth and more technologically advanced extraterrestrial civilisations. This theory, known as palaeocontact theory, is not exclusively Däniken's nor did the idea originate with him. Works of this nature are usually marked by the renunciation of well-established theories on the basis of limited evidence, and the interpretation of evidence with a preconceived theory in mind.

Looting

Looting of archaeological sites by people in search of hoards of buried treasure is an ancient problem. For instance, many of the tombs of the Egyptian pharaohs were looted in antiquity. The advent of archaeology has made ancient sites objects of great scientific and public interest, but it has also attracted unwelcome attention to the works of past peoples. A brisk commercial demand for artefacts encourages looting and the illicit antiquities trade, which smuggles items abroad to private collectors. Looters damage the integrity of a historic site, deny archaeologists valuable information that would be learnt from excavation, and are often deemed to be robbing local people of their heritage. The popular consciousness often associates looting with poor Third World countries. Many are former homes to many well-known ancient civilisations but lack the financial resources or political will to protect even the most significant sites. Certainly, the high prices that intact objects can command relative to a poor farmer's income make looting a tempting financial proposition for some local people. However, looting has taken its toll in places as rich and populous as the United States and Western Europe as well. Abandoned towns of the ancient Sinagua people of Arizona, clearly visible in the desert landscape, have been destroyed in large numbers by treasure hunters. Sites in more densely populated areas farther east have also been looted. Where looting is proscribed by law it takes place under cover of night, with the metal detector a common instrument used to identify profitable places to dig.

Public outreach

Motivated by a desire to halt looting, curb pseudoarchaeology, and to secure greater public funding and appreciation for their work, archaeologists are mounting public-outreach campaigns. They seek to stop looting by informing prospective artefact collectors of the provenance of these goods, and by alerting people who live near archaeological sites of the threat of looting and the danger that it poses to science and their own heritage. Common methods of public outreach include press releases and the encouragement of school field trips to sites under excavation. The final audience for archaeologists' work is the public and it is increasingly realised that their work is ultimately being done to benefit and inform them. The putative social benefits of local heritage awareness are also being promoted with initiatives to increase civic and individual pride through projects such as community excavation projects and better interpretation and presentation of existing sites.

Descendant peoples

In the United States, examples such as the case of Kennewick Man have illustrated the tensions between Native Americans and archaeologists which can be summarised as a conflict between a need to remain respectful towards burials sacred sites and the academic benefit from studying them. For years, American archaeologists dug on Indian burial grounds and other places considered sacred, removing artefacts and human remains to storage facilities for further study. In some cases human remains were not even thoroughly studied but instead archived rather than reburied. Furthermore, Western archaeologists' views of the past often differ from those of tribal peoples. The West views time as linear; for many natives, it is cyclic. From a Western perspective, the past is long-gone; from a native perspective, disturbing the past can have dire consequences in the present. To an archaeologist, the past is long-gone and must be reconstructed through its material remains; to indigenous peoples, it is often still alive. As a consequence of this, American Indians attempted to prevent archaeological excavation of sites inhabited by their ancestors, while American archaeologists believed that the advancement of scientific knowledge was a valid reason to continue their studies. This contradictory situation was addressed by the Native American Graves Protection and Repatriation Act (NAGPRA, 1990), which sought to reach a compromise by limiting the right of research institutions to possess human remains. Due in part to the spirit of postprocessualism, some archaeologists have begun to actively enlist the assistance of indigenous peoples likely to be descended from those under study. Archaeologists have also been obliged to re-examine what constitutes an archaeological site in view of what native peoples believe to constitute sacred space. To many native peoples, natural features such as lakes, mountains or even individual trees have cultural significance. Australian archaeologists especially have explored this issue and attempted to survey these sites in order to give them some protection from being developed. Such work requires close links and trust between archaeologists and the people they are trying to help and at the same time study. While this cooperation presents a new set of challenges and hurdles to fieldwork, it has benefits for all parties involved. Tribal elders cooperating with archaeologists can prevent the excavation of areas of sites that they consider sacred, while the archaeologists gain the elders' aid in interpreting their finds. There have also been active efforts to recruit aboriginal peoples directly into the archaeological profession.

Repatriation

A new trend in the heated controversy between First Nations groups and scientists is the repatriation of native artifacts to the original descendents. An example of this occurred June 21, 2005, when a community members and elders from a number of the 10 Algonquian nations in the Ottawa area convened on the Kitigan Zibi reservation in Kanawagi, Quebec, to inter ancestral human remains and burial goods — some dating back 6,000 years. The ceremony marked the end of a journey spanning thousands of years and many miles. The remains and artifacts, including beads, tools and weapons, were originally excavated from various sites in the Ottawa Valley, including Morrison and the Allumette Islands. They had been part of the Canadian Museum of Civilization’s research collection for decades, some since the late 1800s. Elders from various Algonquin communities conferred on an appropriate reburial, eventually deciding on traditional cedar and birchbark boxes lined with cedar chips, muskrat and beaver pelts. Now, an inconspicuous rock mound marks the reburial site where close to 90 boxes of various sizes are buried. Although negotiations were at times tense between the Kitigan Zibi community and museum, they were able to reach agreement. (Source: [http://www.canadiangeographic.ca/magazine/SO05/indepth/archaeology.asp Canadian Geographic Online].)

External links

- [http://www.archaeologynews.org Archaeology News] Current News and Information pertaining to all areas of archaeology, plus free news feeds for webmasters.
- [http://nefer-seba.net/Archaeological-Fieldwork.php Excavation Sites] Archaeological work and volunteer pages.
- [http://wasteflake.com/tiki-index.php?page=PopularArchaeology Archaeology in Popular Culture]
- [http://www.anthropologie.net/ Anthropology Resources on the Internet] - Anthropology Resources on the Internet : a web directory with over 3000 links grouped in specialised topics.
- [http://www.archaeology.org/ Archaeology magazine] published by the Archaeological Institute of America
- [http://www.archaeologydirectory.com/ Archaeology Directory] - Directory of archaeological topics on the web.
- [http://cctr.umkc.edu/user/fdeblauwe/iraq.html The 2003- Iraq War & Archaeology] Information about looting in Iraq.

Body

:For other uses, see Body (disambiguation). With regard to living things, a body is the integral physical material of an individual, and contrasts with soul, personality and behavior. In some contexts, a superficial element of a body, such as hair may be regarded as not a part of it, even while attached. The same is true of excretable substances, such as stool, both while residing in the body and afterwards. Plants composed of more than one cell are not normally regarded as possessing a body. "Body" often is used in connection with appearance, health issues and death. The body of a dead person is also called a corpse (human) or cadaver. The dead bodies of vertebrate animals and insects are sometimes called carcasses, and dead viruses are called ghosts. The human body consists of a head, neck, trunk, two arms, two legs and the genitals of the groin, which differ between males and females. The study of the working of a body is anatomy. A body is also a held-together collection or group of physical objects or abstract ideas and, in particular, an organisation of such. The whole is more than the simple sum of the individual members, because the whole contains, in addition, information about the relationships among the elements of the whole. The body of evidence is a phrase which defines the sum total of all knowledge or evidence of some thing. Body Ecology focuses on the ecology within the body. We are made up of trillions of microbes. It is beneficial to keep the balance of good guys greater than their opponents.

Injury

Injury is damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical.

Books

- Anne Fausto-Sterling, Myths of Gender: Biological Theories about Women and Men, 2., revised ed., New York, N.Y : Basic Books, 1992
- Mary Roach, Stiff: The Curious Lives of Human Cadavers, 2004, Penguin Books Ltd., UK (ISBN 0141007451)
- Jessica Snyder Sachs, Corpse: Nature, Forensics, and the Struggle to Pinpoint Time of Death (ISBN 0738207713) Category:Death Category:Core issues in ethics ko:몸 ja:死体

Bone

, a typically recognized bone.]] Bone, also called osseous tissue, (Latin: "os") is a type of hard endoskeletal connective tissue found in many vertebrate animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton. Bone has a different composition than cartilage, and both are derived from mesoderm. In common parlance, cartilage can also be called "bone", certainly when referring to animals that only have cartilage as hard connective tissue, such as cartilaginous fish (Chondrichthyes) like sharks. True bone is present in bony fish (Osteichthyes) and all tetrapods. There are several evolutionary alternatives to bone. These evolutionary solutions are not completely functionally analogous to bone.
- Exoskeletal protection is offered by shells, carapaces (consisting of calcium compounds or silica) and chitinous exoskelotons.
- A true endoskeleton (that is, protective tissue derived from mesoderm) is also present in Echinoderms. Porifera (sponges) possess simple endoskeletons that consist of calcareous or siliceous spicules and a spongin fiber network. Bones and skeletons are studied in osteology. Bones can be prepared for study by several methods, such as maceration. Maceration is done by boiling fleshed bone with dish detergent and a little bleach until all large particles are off. The bones are then cleaned by hand, usually with a toothbrush and a degreaser.

Functions

Long bones can be connected to muscles via tendons. Bones connect at joints by ligaments. The interaction between bone and muscle is studied in biomechanics.

Post-mortem functions

Cut and polished bone from a variety of animals is sometimes used as material for jewelry and other crafts. Ground cattle bone is sometimes used as fertilizer. In the Stone Age bone was used to manufacture art, weapons, needles, etc.

Structure

art art Bone is a relatively hard and lightweight composite material, formed mostly of calcium phosphate in the chemical arrangement termed calcium hydroxyapatite. It has relatively high compressive strength but poor tensile strength. While bone is essentially brittle, it does have a degree of significant elasticity contributed by its organic components (chiefly collagen). Bone has an internal mesh-like structure, the density of which may vary at different points. Bone can be either compact or cancellous (spongy). Cortical (outer layer) bone is compact; the two terms are often used interchangeably. Cortical bone makes up a large portion of skeletal mass; but, because of its density, it has a low surface area. Cancellous bone is trabecular (honeycomb structure), it has a relatively high surface area, but forms a smaller portion of the skeleton. Bone can also be either woven or lamellar. Woven bone is put down rapidly during growth or repair. It is so called because its fibres are aligned at random, and as a result has low strength. In contrast lamellar bone has parallel fibres and is much stronger. Woven bone is often replaced by lamellar bone as growth continues. Long bones are tubular in structure (e.g. the tibia). The central shaft of a long bone is called the diaphysis, and has a hollow middle—the medullar cavity filled with bone marrow. Surrounding the medullar cavity is a thin layer of cancellous bone that also contains marrow. The extremities of the bone are called the epiphyses and are mostly cancellous bone covered by a relatively thin cortical of compact bone. In children, the bones are filled with red marrow, which is gradually replaced with yellow marrow as the child ages. Short bones (e.g. finger bones) have a similar structure to long bones, except that they have no medullar cavity. Flat bones (e.g. the skull and ribs) consist of two layers of compact bone with a zone of cancellous bone sandwiched between them. Irregular bones are bones which do not conform to any of the previous forms (e.g. vertebrae). All bones consist of living cells embedded in a mineralised organic matrix that makes up the main bone material.

Cells

Bone Heads include osteoblasts, so called Bone Lining Cells, osteocytes and osteoclasts. Osteoblasts are typically viewed as bone forming cells. They are located near to the surface of bone and their functions are to make osteoid and manufacture hormones such as prostaglandin which act on bone itself. Osteoblasts are mononucleate. Active osteoblasts are situated on the surface of osteoid seams and communicate with each other via gap-junctions. They contain alkaline phosphatase—a chemical which has a role in the mineralisation of bone. Bone Lining Cells (BLCs) share a common lineage with osteogenesis (bone forming) cells. They function as a barrier for certain ions, induced osteogenetic cells. They are flattened, mononucleate cells which line bone. However, osteocytes do originate from osteoblasts which have migrated into and become trapped and surrounded by bone matrix which they themselves produce. The space which they occupy is known as a lacuna. Osteocytes have many processes which reach out to meet osteoblasts probably for the purposes of communication. Their functions include to varying degrees: formation of bone, matrix maintenance and calcium homeostasis. They possibly act as mechano-sensory receptors—regulating the bones' response to stress. If osteoblasts can be described as bone forming cells, the osteoclasts can be described as bone destroying cells. Osteoclasts are large, multinucleated cells located on bone surfaces in what are called Howship's lacunae. These lacunae, or resorption pits, are left behind after the breakdown of bone and often present as scalloped surfaces. Because the osteoclasts are derived from a monocyte stem-cell lineage, they are equipped with engulfment strategies similar to circulating macrophages. Osteoclasts mature and/or migrate to discrete bone surfaces. Upon arrival active enzymes, such as acid phosphatase, are secreted against the mineral substrate. This process, called bone resorption, allows stored calcium to be released into systemic circulation and is an important process in regulating calcium balance. As bone formation actively fixes circulating calcium in its mineral form, resorption actively unfixes it thereby increasing circulating calcium levels. These processes occur in tandem at site-specific locations and are known as bone turnover, or remodeling. Osteoblasts and osteoclasts, coupled together via paracrine cell signalling, are referred to as bone remodeling units. The iteration of remodeling events at the cellular level is influential on shaping and sculpting the skeleton both during growth as well as after.

Matrix

The matrix comprises the other major constituent of bone. It has inorganic and organic parts. The inorganic is mainly crystalline mineral salts and calcium, which is present in the form of hydroxyapatite. The matrix is initially laid down as unmineralized osteoid (manufactured by osteoblasts). Mineralisation involves osteoblasts secreting vesicles containing alkaline phosphatase. This cleaves phosphate groups and acts as the foci for calcium and phosphate deposition. The vesicles then rupture and act as a centre for crystals to grow on. The organic part of matrix is mainly Type I collagen. This is made intracellularly as tropocollagen and then exported. It then associates into fibrils. Also making up the organic part of matrix include various growth factors, the functions of which are not fully known. Other factors present include GAGs, osteocalcin, osteonectin, bone sialo protein and Cell Attachment Factor.

Formation

bone sialo protein The formation of bone occurs by two methods: intramembranous and endochondral ossification. Intramembranous ossification mainly occurs during formation of the flat bones of the skull; the bone is formed from mesenchyme tissue. Endochondral ossification occurs in long bones, such as limbs; the bone is formed from cartilage. Endochondral ossification begins with points in the cartilage called "primary ossification centers." They mostly appear during fetal development, though a few short bones begin their primary ossification after birth. They are responsible for the formation of the diaphyses of long bones, short bones and certain parts of irregular bones. Secondary ossification occurs after birth, and forms the epiphyses of long bones and the extremities of irregular and flat bones. The diaphyses and the epiphyses of long bones remain separated by a growing zone of cartilage (the metaphysis) until the child reaches skeletal maturity (18 to 25 years of age), whereupon the cartilage ossifies, fusing the two together (epiphyseal closure). Marrow can be found in most any bone that holds cancellous tissue. In newborns, all such bones are filled exclusively with red marrow (or hemopoietic marrow), but as the child ages it is mostly replaced by yellow marrow (or fatty marrow). In adults, red marrow is mostly found in the flat bones of the skull, the ribs, the vertebrae and pelvic bones. Remodeling is the process of resorption followed by replacement of bone with little change in shape and occurs throughout a person's life. Its purpose is the release of calcium and the repair of micro-damaged bones (from everyday stress). Repeated stress results in the bone thickening at the points of maximum stress. It has been hypothesized that this is a result of bone's piezoelectric properties, which cause bone to generate small electrical potentials under stress.

Bone pathologies

One of the most common bone illnesses is a bone fracture. Bones heal by natural processes, but untended and unsupported can lead to misgrown bone. Other illnesses are for example osteoporosis and bone cancer (osteosarcoma). The joints can be affected by arthritis.

Terminology

: There are also names for specific parts of long bones. :

External links

- [http://silver.neep.wisc.edu/~lakes/BoneElectr.html Review (including references) of piezoelectricity and bone remodelling] Category:Anatomy Category:Skeletal system Category:Bone products ko:뼈 ja:骨 simple:Bone

Natural environment

The natural environment comprises all living and non-living things that occur naturally on Earth. In its purest sense, it is thus an environment that is not the result of human activity or intervention. The natural environment may be contrasted to "the built environment." For some, there is a difficulty with the term "natural environment" in that nearly all environments have been directly or indirectly influenced by humans at some point in time. In order to address this concern, some level of human influence is thus allowable without the status of any particular landscape ceasing to be "natural." The term's meaning, however, is usually dependent more on context than a set definition. Many natural environments are the product of the interaction between nature and humans. For this reason, the term ecosystem has been used to describe an environment that contains nature, and includes people. It follows then that environmental problems are human or social problems. Some also consider it dangerously misleading to regard "environment" as separate from "people." It is the common understanding of natural environment that underlies environmentalism—a broad political, social, and philosophical movement that advocates various actions and policies in the interest of protecting what nature remains in the natural environment, or restoring or expanding the role of nature in this environment. While wilderness is increasingly rare, wild nature (e.g., unmanaged forests, uncultivated grasslands, wildlife, wildflowers) can be found in many locations previously inhabited by humans. Goals commonly expressed by environmentalists include: reduction and clean up of man-made pollution, with future goals of zero pollution; reducing societal consumption of non-renewable fuels, development of alternative, green, low carbon or renewable energy sources; conservation and sustainable use of scarce resources such as water, land and air; protection of representative or unique or pristine ecosystems; preservation and expansion of threatened or endangered species or ecosystems from extinction; the establishment of nature and biosphere reserves under various types of protection, and, most generally, the protection of biodiversity and ecosystems upon which all human and other life on earth depends. More recently, there has been a strong concern about climatic changes caused by anthroprogenic releases of greenhouse gases, most notably carbon dioxide, and their interactions with human uses and the natural environment. Efforts here have focused on the mitigition of greenhouse gases that are causing climatic changes (i.e., through the Climate Change Convention and the Kyoto Protocol), and ondeveloping adaptative strategies to assist species, ecosystems, humans, nations and regions in adjusting to these climatic changes.

Domnal I of Dalriada

Domnal I the Freckled (Scottish Gaelic: Domnal mac Eochaid Brecc; English: Donald) (d. 642 in Strathcarron) was king of Dál Riada from about 629 until 642. He was the son of Eochaid I and father of Domangart II. Domnall suffered four defeats after he broke Dál Riada's alliance with the Uí Néill clan of Irish High Kings. In Ireland, Domnal was defeated by the Uí Néill at Mag Rath in 637. He lost to the Picts in 635 and 638 and finally, and fatally, to the Strathclyde Britons at Strathcarron in 642, where he died. He was succeeded by Ferchar I. Category:642 deaths Category:Post-Roman Scotland Category:Medieval Gaels

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Zooarchaeology

External link

Animal

Characteristics

Structure

Reproduction and development

Origin and fossil record

Groups of animals

Deuterostomes

Ecdysozoa

Platyzoa

Lophotrochozoa

History of classification

Usage of the word animal

Examples

See also

References

External links

Archeology

Ontology and definition

Importance and applicability

Goals

Academic sub-disciplines

Cultural resources management

Field methods

Survey

Excavation

Post-excavation analysis

History of archaeology

Archaeological theory

Public archaeology

Pseudoarchaeology

Looting

Public outreach

Descendant peoples

Repatriation

Related topics

External links

Further reading

Body

Injury

See also

Books

Bone

Functions

Post-mortem functions

Structure

Cells

Matrix

Formation

Bone pathologies

Terminology

See also

External links

Natural environment

See also

Domnal I of Dalriada