Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types, and hair care, but hair is also an important biomaterial primarily composed of protein, notably alpha-keratin.
Mosquitoes, the Culicidae, are a family of small flies consisting of 3,600 species. The word mosquito is Spanish and Portuguese for little fly. Mosquitoes have a slender segmented body, one pair of wings, three pairs of long hair-like legs, and specialized, highly elongated, piercing-sucking mouthparts. All mosquitoes drink nectar from flowers; females of some species have in addition adapted to drink blood. Evolutionary biologists view mosquitoes as micropredators, small animals that parasitise larger ones by drinking their blood without immediately killing them. Medical parasitologists view mosquitoes instead as vectors of disease, carrying protozoan parasites or bacterial or viral pathogens from one host to another.
Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics, exposure to the sun, disorders, or some combination thereof. Differences across populations evolved through natural selection or sexual selection, because of social norms and differences in environment, as well as regulations of the biochemical effects of ultraviolet radiation penetrating the skin.
Melanin is a family of biomolecules organized as oligomers or polymers, which among other functions provide the pigments of many organisms. Melanin pigments are produced in a specialized group of cells known as melanocytes.
Freckles are clusters of concentrated melaninized cells which are most easily visible on people with a fair complexion. Freckles do not have an increased number of the melanin-producing cells, or melanocytes, but instead have melanocytes that overproduce melanin granules (melanosomes) changing the coloration of the outer skin cells (keratinocytes). As such, freckles are different from lentigines and moles, which are caused by accumulation of melanocytes in a small area. Freckles can appear on all types of skin tones. Of the six Fitzpatrick skin types, they are most common on skin tones 1 and 2, which usually belong to North Europeans. However, it can also be found on people all over the world. In England a historical term for freckles is summer-voys, sometimes spelt summervoise, which may be related to the German "summersprosse". 10 percent of the world's population have freckles; that's 800 million people.
Dreadlocks, also known as dreads or locs, are a hairstyle made of rope-like strands of hair. This is done by not combing the hair and allowing it to mat naturally or by twisting it manually. Over time, the hair will form tight braids or ringlets.
The Himba are an ethnic group with an estimated population of about 50,000 people living in northern Namibia, in the Kunene Region and on the other side of the Kunene River in southern Angola. There are also a few groups left of the OvaTwa, who the OvaHimba consider to be part of their tribe, but are hunter-gatherers. Culturally distinguishable from the Herero people, the OvaHimba are a semi-nomadic, pastoralist people and speak OtjiHimba, a variety of Herero, which belongs to the Bantu family within Niger–Congo. The OvaHimba are semi-nomadic as they have base homesteads where crops are cultivated, but may have to move within the year depending on rainfall and where there is access to water.
N,N-Diethyl-meta-toluamide, also called diethyltoluamide or DEET, is the oldest, one of the most effective and most common active ingredient in commercial insect repellents. It is a slightly yellow oil intended to be applied to the skin or to clothing and provides protection against mosquitoes, flies, ticks, fleas, chiggers, leeches, and many other biting insects.
Ochre, iron ochre, or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand. It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as red ochre.
Mehndi is a form of temporary skin decoration using a paste created with henna. In the West, mehndi is commonly known as henna tattoo, although it is not a permanent tattoo.
An insect repellent is a substance applied to the skin, clothing, or other surfaces to discourage insects from landing or climbing on that surface. Insect repellents help prevent and control the outbreak of insect-borne diseases such as malaria, Lyme disease, dengue fever, bubonic plague, river blindness, and West Nile fever. Pest animals commonly serving as vectors for disease include insects such as flea, fly, and mosquito; and ticks (arachnids).
The history of cosmetics spans at least 7,000 years and is present in almost every society on earth. Cosmetic body art is argued to have been the earliest form of a ritual in human culture. The evidence for this comes in the form of utilised red mineral pigments including crayons associated with the emergence of Homo sapiens in Africa. Cosmetics are mentioned in the Old Testament—2 Kings 9:30 where Jezebel painted her eyelids—approximately 840 BC—and the book of Esther describes various beauty treatments as well.
Henna is a reddish dye prepared from the dried and powdered leaves of the henna tree. It has been used since at least the ancient Egyptian period as a hair and body dye, notably in the temporary body art of mehndi resulting from the staining of the skin using dyes from the henna plant. After henna stains reach their peak colour, they hold for a few days, then gradually wear off by way of exfoliation, typically within one to three weeks.
Ethyl butylacetylaminopropionate is an insect repellent whose trade name is IR3535 and was developed and commercialized by Merck KGaA (Germany). It is a colorless and odorless oil with a good skin feel in final products, and it is biodegradable.
Margaret Jacobsohn is a Namibian environmentalist. She was awarded the Goldman Environmental Prize in 1993, jointly with Garth Owen-Smith, for their efforts on conservation of wildlife in rural Namibia.
The Zembapeople are a Bantu ethnic group residing in the border regions of Namibia and Angola. In Namibia, they are predominantly found in the Kunene region, most notably in the Opuwa area. They speak the Zemba language, also known as OtjiZemba or Dhimba. The Zemba are well-known for their distinctive hairstyles, intricate iron and copper jewelry, as well as traditional clothing that often incorporates animal hides. Additionally, they decorate themselves with a blend of ash, ochre paste, and rancid butter to enhance their appearance.
Rose Cottage Cave (RCC) is an archaeological site in the Free State, South Africa, situated only a few kilometers away from Ladybrand, close to the Caledon River, on the northern slopes of the Platberg. RCC is an important site because of its long cultural sequence, its roots in modern human behavior, and the movement of early modern humans out of Africa. Rose Cottage is the only site from the Middle Stone Age that can tell us about the behavioral variability of hunter-gatherers during the Late Pleistocene and Holocene. Berry D. Malan excavated the site between 1943 and 1946, shortly followed by Peter B. Beaumont in the early 1960s, and the most recent excavations occurred from 1987 to 1997 by Lyn Wadley and Philip Harper in 1989 under Wadley's supervision. Humans have inhabited Rose Cottage for over 100,000 years throughout the Middle and Later Stone Ages. Site formation and sediment formation processes at Rose Cottage appear to be primarily anthropogenic. Archaeological research focuses primarily on blade technology and tool forms from the Middle Stone Age and the implications of modern human behavior. Structurally, the cave measures more than 6 meters deep and about 20 by 10 meters. A boulder encloses the front, protecting the cave, but allowing a small opening for a skylight and narrow entrances on both the east and west sides.
Culture in Namibia is a blend of many different people and its culture and customs have absorbed both African and European elements and fused them into a blend of the two. Although the country is urbanising rapidly, a majority of Namibians still live in rural areas and lead largely impoverished lives. It is among these people, however, that cultural tradition survive most strongly.
Letsoku is a clayey soil used by several tribes in Southern Africa and other parts of the African continent.The Sotho-Tswana of Southern Africa have described a number of clay soils as letsoku. These are named differently by other tribes in the region, it is known as chomane in Shona, ilibovu in Swati, imbola in Xhosa and luvhundi in Venda, there are many other names given by other ethnic groups. Letsoku occurs naturally in a number of colours and it has many use, it is mostly used for cosmetic applications in Southern Africa. However, other functions of it is related to artwork, medicinal use, cultural symbolism and traditional beliefs
Masonjoany is a cosmetic paste and sunscreen made of ground wood. It is worn as a protective and decorative mask by women and girls in Madagascar, Comoros, and Mayotte. In Madagascar, the paste has yellow and white forms, with yellow masonjoany being derived from the wood of the tabàky or Madagascar sandalwood, and white masonjoany deriving from the wood of the aviavy or fihamy tree. In Comoros, the most commonly used tree for msindzano is Indian sandalwood. The wood is ground against a surface of ceramic, stone, or coral skeleton, and combined with water and oil to make the paste. The practice in Madagascar originates from cultural exchange in Nosy Be between Malagasy natives and Indian merchants, who first arrived to the island in the 11th century CE.
