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Basal West African
Basal West African is a hypothetical line of descent that is no longer extant. History Utilizing Western Africans (e.g., Esan of Nigeria, Mende of Sierra Leone, The Gambia#Ethnic groups, western Gambians), the divergence of a set of early modern or archaic humans, numbering around 25,000 or between 23,000 and 27,000, from either the last common ancestor of the San people and all other modern humans, or humans and Neanderthals, is approximated to have occurred between 360,000 BP and 1,020,000 BP. Between 124,000 BP and 0 BP, 2% – 19% of the genes may have introgressed into ancestors of modern Africans as a result of admixture with this population. Modern Western Africans (e.g., Yoruba of Ibadan, Nigeria, Mende of Sierra Leone) may have more ancestry from this lineage as a result of their ancestry from Basal West Africans. Even before 200,000 BP to 300,000 BP, when the ancestors of the modern San split from modern humans, the group to split the most early from modern humans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Esan People
The Esan people ( Esan: ''Ẹ̀bhò Ẹ̀sán'') are an ethnic group of southern Nigeria who speak the Esan language. The Esan are traditionally known to be agriculturalists, trado-medical practitioners, mercenary warriors and hunters. They cultivate palm trees, Irvingia gabonensis (erhonhiele), Cherry (Otien), bell pepper (akoh) coconut, betel nut, kola nut, black pear, avocado pear, yams, cocoyam, cassava, maize, rice, beans, groundnut, bananas, oranges, plantains, sugar cane, tomato, potato, okra, pineapple, paw paw, and various vegetables. The modern Esan nation is believed to have been organized during the 15th century, when citizens, mostly nobles and princes, left the neighbouring Benin Empire for the northeast; there they formed communities and kingdoms called among the aboriginal peoples whom they met there There are on the whole 35 established kingdoms in Esanland, including Amahor, Ebelle, Egoro, Ewohimi, Ekekhenlen, Ekpoma, Ekpon, Emu, Ewu, Ewato, Ewosa, Idoa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Modelling
Scientific modelling is a scientific activity, the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate by referencing it to existing and usually commonly accepted knowledge. It requires selecting and identifying relevant aspects of a situation in the real world and then developing a model to replicate a system with those features. Different types of models may be used for different purposes, such as conceptual models to better understand, operational models to operationalize, mathematical models to quantify, computational models to simulate, and graphical models to visualize the subject. Modelling is an essential and inseparable part of many scientific disciplines, each of which has its own ideas about specific types of modelling. The following was said by John von Neumann. There is also an increasing attention to scientific modelling in fields such as science education, philosophy of science, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Genealogy
Genetic genealogy is the use of genealogical DNA tests, i.e., DNA profiling and DNA testing, in combination with traditional genealogical methods, to infer genetic relationships between individuals. This application of genetics came to be used by family historians in the 21st century, as DNA tests became affordable. The tests have been promoted by amateur groups, such as surname study groups or regional genealogical groups, as well as research projects such as the Genographic Project. As of 2019, about 30 million people had been tested. As the field developed, the aims of practitioners broadened, with many seeking knowledge of their ancestry beyond the recent centuries, for which traditional pedigrees can be constructed. History The investigation of surnames in genetics can be said to go back to George Darwin, a son of Charles Darwin and Charles' first cousin Emma Darwin. In 1875, George Darwin used surnames to estimate the frequency of first-cousin marriages and calculated t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeogenetic Lineages
Archaeogenetics is the study of ancient DNA using various molecular genetic methods and DNA resources. This form of genetic analysis can be applied to human, animal, and plant specimens. Ancient DNA can be extracted from various fossilized specimens including bones, eggshells, and artificially preserved tissues in human and animal specimens. In plants, Ancient DNA can be extracted from seeds and tissue. Archaeogenetics provides us with genetic evidence of ancient population group migrations, domestication events, and plant and animal evolution. The ancient DNA cross referenced with the DNA of relative modern genetic populations allows researchers to run comparison studies that provide a more complete analysis when ancient DNA is compromised. Archaeogenetics receives its name from the Greek word ''arkhaios'', meaning "ancient", and the term ''genetics'', meaning "the study of heredity". The term archaeogenetics was conceived by archaeologist Colin Renfrew. In February 2021, scientis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Africa
East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territories make up Eastern Africa: Due to the historical Omani Empire and colonial territories of the British East Africa Protectorate and German East Africa, the term ''East Africa'' is often (especially in the English language) used to specifically refer to the area now comprising the three countries of Kenya, Tanzania, and Uganda. However, this has never been the convention in many other languages, where the term generally had a wider, strictly geographic context and therefore typically included Djibouti, Eritrea, Ethiopia, and Somalia.Somaliland is not included in the United Nations geoscheme, as it is internationally recognized as a part of Somalia. *Tanzania, Kenya, Uganda, Rwanda, Burundi, Democratic Republic of Congo and South Sudan are members of the East African Community. The firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taforalts
Taforalt or Grotte des Pigeons is a cave in the province of Berkane, Aït Iznasen region, Morocco, possibly the oldest cemetery in North Africa (Humphrey ''et al.'' 2012). It contained at least 34 Iberomaurusian adolescent and adult human skeletons, as well as younger ones, from the Upper Palaeolithic between 15,100 and 14,000 calendar years ago. There is archaeological evidence for Iberomaurusian occupation at the site between 23,200 and 12,600 calendar years ago, as well as evidence for Aterian occupation as old as 85,000 years. Site description La Grotte des Pigeons is a cave in eastern Morocco near the village of Taforalt. Human occupation and natural processes in the cave have produced a thick sequence of archaeological layers dating between at least 85,000 and 10,000 years ago. These occupation layers include pre-Mousterian, Aterian, and Iberomaurusian lithic industries, plus an unusual non-Levallois industry between the Aterian and the Iberomaurusian dating to c. 24,500 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sub-Saharan African
Sub-Saharan Africa is, geographically, the area and regions of the continent of Africa that lies south of the Sahara. These include West Africa, East Africa, Central Africa, and Southern Africa. Geopolitically, in addition to the African countries and territories that are situated fully in that specified region, the term may also include polities that only have part of their territory located in that region, per the definition of the United Nations (UN). This is considered a non-standardized geographical region with the number of countries included varying from 46 to 48 depending on the organization describing the region (e.g. UN, WHO, World Bank, etc.). The African Union uses a different regional breakdown, recognizing all 55 member states on the continent - grouping them into 5 distinct and standard regions. The term serves as a grouping counterpart to North Africa, which is instead grouped with the definition of MENA (i.e. Middle East–North Africa) as it is part of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Africa
West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, and Togo, as well as Saint Helena, Ascension and Tristan da Cunha ( United Kingdom Overseas Territory).Paul R. Masson, Catherine Anne Pattillo, "Monetary union in West Africa (ECOWAS): is it desirable and how could it be achieved?" (Introduction). International Monetary Fund, 2001. The population of West Africa is estimated at about million people as of , and at 381,981,000 as of 2017, of which 189,672,000 are female and 192,309,000 male. The region is demographically and economically one of the fastest growing on the African continent. Early history in West Africa included a number of prominent regional powers that dominated different parts of both the coastal and internal trade networks, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeastern Africa
Southeast Africa or Southeastern Africa is an African region that is intermediate between East Africa and Southern Africa. It comprises the countries Botswana, Eswatini, Kenya, Lesotho, Malawi, Mozambique, Namibia, Rwanda, South Africa, Tanzania, Uganda, Zambia and Zimbabwe in the mainland, with the island-nations of Madagascar, Mauritius, Comoros, and Seychelles also included. History Prehistory East and southern Africa are among the earliest regions where modern humans (Homo sapiens) and their predecessors are believed to have lived. In September 2019, scientists reported the computerized determination, based on 260 CT scans, of a virtual skull shape of the last common human ancestor to modern humans/''H. sapiens'', representative of the earliest modern humans, and suggested that modern humans arose between 350,000 and 260,000 years ago through a merging of populations in South and East Africa. Bantu expansion Bantu-speakers traversed from Central Africa into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal (phylogenetics)
In phylogenetics, basal is the direction of the ''base'' (or root) of a phylogenetic tree#Rooted tree, rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Note that extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa. While there must always be two or more equally "basal" clades sprouting from the root of every cladogram, those clades may differ widely in taxonomic rank, Phylogenetic diversity, species diversity, or both. If ''C'' is a basal clade within ''D'' that has the lowest rank of all basal clades within ''D'', ''C'' may be described as ''the'' basal taxon of that rank within ''D''. The concept of a 'key innovation' implies some degree of correlation between evolutionary innovation and cladogenesis, diversification. However, such a correlation does not make a given ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypothetical
A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used interchangeably, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research in a process beginning with an educated guess or thought. A different meaning of the term ''hypothesis'' is used in formal logic, to denote the antecedent of a proposition; thus in the proposition "If ''P'', then ''Q''", ''P'' denotes the hypothesis (or antecedent); ''Q'' can be called a consequent. ''P'' is the assumption in a (possibly counterfactual) ''What If'' question. The adjective ''hypothetical'', meaning "havin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khoisan
Khoisan , or (), according to the contemporary Khoekhoegowab orthography, is a catch-all term for those indigenous peoples of Southern Africa who do not speak one of the Bantu languages, combining the (formerly "Khoikhoi") and the or ( in the Nǁng language). The San were formerly called Bushmen, (from Afrikaans ''Boesmans'' from nl, Boschjesmens); and the were formerly known as " Hottentots", speculated to be a Dutch onomatopoeic term referring to the click consonants prevalent in the Khoekhoe languages. However there is no evidence of this etymology."A very large number of different etymologies for the name have been suggested ... The most frequently repeated suggestion ... is that the word was a spec. use of a formally identical Dutch word meaning ‘stammerer, stutterer’, which came to be applied to the Khoekhoe and San people on account of the clicks characteristic of their languages. However, evidence for the earlier general use appears to be lacking. Another fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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