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History Of Niger
This is the history of the Niger. See also the history of Africa and the history of West Africa. Pre-historic Niger Humans have lived in what is now the Niger from the earliest of times. 2 to 3.5 million-year-old Australopithecus bahrelghazali remains have been found in neighboring Chad. Archeologists in the Niger have much work to do, with little known of the prehistory of the societies that inhabited the south, the home of the vast majority of modern Nigeriens.Anne C. Haour. One Hundred Years of Archaeology in Niger. Journal of World Prehistory. Volume 17, Number 1, June 2003, pp. 181–234(54) The deserts and the mountains of the north, though, have garnered attention for the ancient abandoned cities and prehistoric rock carvings found in the Aïr Mountains and the Ténéré desert. Considerable evidence indicates that about 60,000 years ago, humans inhabited what has since become the desolate Sahara Desert of northern Niger. Later, on what was then huge fertile grasslands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Africa
The history of Africa begins with the emergence of hominids, archaic humans and — around 300–250,000 years ago—anatomically modern humans (''Homo sapiens''), in East Africa, and continues unbroken into the present as a patchwork of diverse and politically developing nation states. The earliest known recorded history arose in Ancient Egypt, and later in Nubia, the Sahel, the Maghreb, and the Horn of Africa. Following the desertification of the Sahara, North African history became entwined with the Middle East and Southern Europe while the Bantu expansion swept from modern day Cameroon (Central Africa) across much of the sub-Saharan continent in waves between around 1000 BC and 1 AD, creating a linguistic commonality across much of the central and Southern continent. During the Middle Ages, Islam spread west from Arabia to Egypt, crossing the Maghreb and the Sahel. Some notable pre-colonial states and societies in Africa include the Ajuran Empire, Bachwezi Em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savanna
A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. According to '' Britannica'', there exists four savanna forms; ''savanna woodland'' where trees and shrubs form a light canopy, ''tree savanna'' with scattered trees and shrubs, ''shrub savanna'' with distributed shrubs, and ''grass savanna'' where trees and shrubs are mostly nonexistent.Smith, Jeremy M.B.. "savanna". Encyclopedia Britannica, 5 Sep. 2016, https://www.britannica.com/science/savanna/Environment. Accessed 17 September 2022. Savannas maintain an open canopy despite a high tree density. It is often believed that savannas feature widely spaced, scattered trees. However, in many savannas, tree densities are higher and trees are more regularly spaced than in for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tadrart Acacus
The Acacus Mountains or Tadrart Akakus ( ar, تدرارت أكاكوس / ALA-LC: ''Tadrārt Akākūs'') form a mountain range in the desert of the Ghat District in western Libya, part of the Sahara. They are situated east of the city of Ghat, Libya, and stretch north from the border with Algeria, about . The area has a particularly rich array of prehistoric rock art. History Etymology ''Tadrart'' is the feminine form of "mountain" in the Berber languages (masculine: ''adrar''). Rock art The area is known for its rock art and was inscribed as a UNESCO World Heritage Site in 1985 because of the importance of these paintings and carvings. The paintings date from 12,000 BCE to 100 CE and reflect cultural and natural changes in the area. There are paintings and carvings of animals such as giraffes, elephants, ostriches and camels, but also of humans and horses. People are depicted in various daily life situations, for example while making music and dancing. File:Tadrart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tassili
Tassili n'Ajjer (Berber: ''Tassili n Ajjer'', ar, طاسيلي ناجر; "Plateau of rivers") is a national park in the Sahara desert, located on a vast plateau in southeastern Algeria. Having one of the most important groupings of prehistoric cave art in the world, and covering an area of more than , Tassili n'Ajjer was inducted into the UNESCO World Heritage Site list in 1982 by Gonde Hontigifa. Geography Tassili n'Ajjer is a plateau in southeastern Algeria at the borders of Libya, Niger, and Mali, covering an area of 72,000 km2. It ranges from east-south-east to . Its highest point is the Adrar Afao that peaks at , located at . The nearest town is Djanet, situated approximately southwest of Tassili n'Ajjer. The archaeological site has been designated a national park, a Biosphere Reserve (cypresses) and was inducted into the UNESCO World Heritage Site list as Tassili n'Ajjer National Park. The plateau is of great geological and aesthetic interest. Its panorama of geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alder
Alders are trees comprising the genus ''Alnus'' in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes. Description With a few exceptions, alders are deciduous, and the leaves are alternate, simple, and serrated. The flowers are catkins with elongate male catkins on the same plant as shorter female catkins, often before leaves appear; they are mainly wind-pollinated, but also visited by bees to a small extent. These trees differ from the birches (''Betula'', another genus in the family) in that the female catkins are woody and do not disintegrate at maturity, opening to release the seeds in a similar manner to many conifer cones. The largest species are red alder (''A. rubra'') on the west coast of North America, and black alder (''A. glutinosa''), native ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lime (fruit)
A lime (from French language, French ''lime'', from Arabic ''līma'', from Persian language, Persian ''līmū'', "lemon") is a citrus fruit, which is typically round, lime (color), green in color, in diameter, and contains acidic juice vesicles. There are several species of citrus trees whose fruits are called limes, including the Key lime (''Citrus aurantiifolia''), Persian lime, kaffir lime, Makrut lime, and Citrus glauca, desert lime. Limes are a rich source of vitamin C, are sour, and are often used to accent the flavours of foods and beverages. They are grown year-round. Plants with fruit called "limes" have diverse genetic origins; limes do not form a monophyletic group. Plants known as "lime" The difficulty in identifying exactly which species of fruit are called lime in different parts of the English-speaking world (and the same problem applies to synonyms in other European languages) is increased by the botanical complexity of the citrus genus itself, to which the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walnut
A walnut is the edible seed of a drupe of any tree of the genus ''Juglans'' (family Juglandaceae), particularly the Persian or English walnut, '' Juglans regia''. Although culinarily considered a "nut" and used as such, it is not a true botanical nut. After full ripening, the shell is discarded and the kernel is eaten. Nuts of the eastern black walnut (''Juglans nigra'') and butternuts ('' Juglans cinerea'') are less commonly consumed. Characteristics Walnuts are rounded, single-seeded stone fruits of the walnut tree commonly used for food after fully ripening between September and November, in which the removal of the husk at this stage reveals a browning wrinkly walnut shell, which is usually commercially found in two segments (three or four-segment shells can also form). During the ripening process, the husk will become brittle and the shell hard. The shell encloses the kernel or meat, which is usually made up of two halves separated by a membranous partition. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahaggar Mountains
The Hoggar Mountains ( ar, جبال هقار, Berber: ''idurar n Ahaggar'') are a highland region in the central Sahara in southern Algeria, along the Tropic of Cancer. The mountains cover an area of approximately 550,000 km. Geography This mountainous region is located about south of the capital, Algiers. The area is largely rocky desert with an average elevation of more than above sea level. The highest peak, Mount Tahat, is at . The mountains are primarily composed of metamorphic rock approximately 2 billion years old, although there are areas where more recent volcanic activity has laid down much newer rock. Several of the more dramatic peaks, such as Ilamen, are the result of erosion wearing away extinct volcano domes, leaving behind the more resistant material that plugged the volcanic cores. Assekrem is a famous and often visited point where Charles de Foucauld built a hermitage in 1911. The main city near the Hoggar Mountains is Tamanrasset, built in a desert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tibesti
The Tibesti Mountains are a mountain range in the central Sahara, primarily located in the extreme north of Chad, with a small portion located in southern Libya. The highest peak in the range, Emi Koussi, lies to the south at a height of and is the highest point in both Chad and the Sahara. Bikku Bitti, the highest peak in Libya, is located in the north of the range. The central third of the Tibesti is of volcanic origin and consists of five volcanoes topped by large depressions: Emi Koussi, Tarso Toon, Tarso Voon, Tarso Yega and Toussidé. Major lava flows have formed vast plateaus that overlie Paleozoic sandstone. The volcanic activity was the result of a continental hotspot that arose during the Oligocene and continued in some places until the Holocene, creating fumaroles, hot springs, mud pools and deposits of natron and sulfur. Erosion has shaped volcanic spires and carved an extensive network of canyons through which run rivers subject to highly irregular flows that are ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massif
In geology, a massif ( or ) is a section of a planet's crust that is demarcated by faults or flexures. In the movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. The term also refers to a group of mountains formed by such a structure. In mountaineering and climbing literature, a massif is frequently used to denote the main mass of an individual mountain. The massif is a smaller structural unit of the crust than a tectonic plate, and is considered the fourth-largest driving force in geomorphology. The word is taken from French (in which the word also means "massive"), where it is used to refer a large mountain mass or compact group of connected mountains forming an independent portion of a range. One of the most notable European examples of a massif is the Massif Central of the Auvergne region of France. The Face on Mars is an example of an extraterrestrial massif. Massifs may also form underwater, as with the Atlanti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libyan Desert
The Libyan Desert (not to be confused with the Libyan Sahara) is a geographical region filling the north-eastern Sahara Desert, from eastern Libya to the Western Desert of Egypt and far northwestern Sudan. On medieval maps, its use predates today's Sahara, and parts of the Libyan Desert include the Sahara's most arid and least populated regions; this is chiefly what sets the Libyan Desert apart from the greater Sahara. The consequent absence of grazing, and near absence of waterholes or wells needed to sustain camel caravans, prevented Trans-Saharan trade between Kharga (the Darb al Arbein) close to the Nile, and Murzuk in the Libyan Fezzan. This obscurity saw the region overlooked by early European explorers, and it was not until the early 20th century and the advent of the motor car before the Libyan Desert started to be fully explored. Nomenclature The term 'Libyan Desert' began to appear widely on European maps in the last decades of the 19th century, typically identified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roland Oliver
Roland Anthony Oliver FBA (30 March 1923 – 9 February 2014) was an Indian-born English academic and Emeritus Professor of African history at the University of London. Throughout a long career he was an eminent researcher, writer, teacher, administrator and organiser, who had a profound effect on the development of African Studies in the United Kingdom. Biography Oliver was born in Srinagar, Kashmir, India in 1923. Following his undergraduate and doctoral studies at the University of Cambridge between 1941 and 1948, Roland Oliver joined the staff of the School of Oriental and African Studies (SOAS) at the University of London, where he was successively Lecturer, Reader and Professor until his retirement in 1986. His appointment as a Lecturer in African history marked the beginnings of the contemporary academic field of African history. The African History Seminar that he founded and chaired at the School of Oriental and African Studies (SOAS) became the most important ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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