Solar radiation heats up the body's surface and not the interior. [89][90], Melanesia, a subregion of Oceania, whose name means "black islands", have several islands that are inhabited by people with dark skin pigmentation. [75][76] Low vitamin D levels have also been linked to impaired immune system and brain functions. [88], The term black initially has been applied as a reference to the skin pigmentation of the aborigines of Australia; today it has been embraced by aboriginal activists as a term for shared culture and identity, regardless of skin colour. The popularity of sugary drinks and decreased time spent outside have contributed to significant rise of developing rickets. [97][98] Dark-skinned groups on the continent have the same receptor protein as Homo ergaster and Homo erectus had. This is not a problem near the equator; however, it can be a problem at higher latitudes. Perfect for Valentine’s Day to tell your sweetie, or just because you love them everyday. Saying dark in Middle-Eastern Languages. [3][22][23], Due to natural selection, people who lived in areas of intense sunlight developed dark skin colouration to protect against ultraviolet (UV) light, mainly to protect their body from folate depletion. [108], Genetic tests show significant Austronesian influence,[109] theorizing that Amazonian Indians and Austronesians both diverged from common ancestor. A dark-skinned person requires about six times as much UVB than lightly-pigmented persons. Nina Jablonski, a professor of anthropology and expert on evolution of human skin coloration,[33] found several cases in which mothers' visits to tanning studios were connected to neural tube defects in early pregnancy. eye color. There is an opening scene taking place in Seville in Mission Impossible 2 (2000) that is hilarious for its many inaccuracies about Spain, Seville, and its local Spanish festivals . [3][16], Dark-skinned people who live in high latitudes with mild sunlight are at an increased risk—especially in the winter—of vitamin D deficiency. A combination of protein-heavy diets and summer snow reflection have been speculated as favouring the retention of pigmented skin. God judged our ancestor’s disobedience by imposing different languages on them by their family groups. The skin takes a very large amount of ultraviolet radiation. There are also some other nuts that show a similar color very positive, feminine vibes. a hint of red. Water reflects, depending on colour, about 10 to 30% of UVR that falls on it. In the tropics, natural selection favoured dark-skinned human populations as high levels of skin pigmentation protected against the harmful effects of sunlight. Studies into these populations indicates dark skin is a retention of the pre-existing high UVR-adapted state of modern humans before the out of Africa migration and not a later evolutionary adaptation. A larger percentage of dark-skinned people are found in the Southern Hemisphere because latitudinal land mass distribution is disproportionate. Folate also plays an important role in the development of many neurotransmitters, e.g. [3] For the same body region, light- and dark-skinned individuals have similar numbers of melanocytes (there is considerable variation between different body regions), but pigment-containing organelles, called melanosomes, are larger and more numerous in dark-skinned individuals. This is the translation of the word "dark" to over 100 other languages. A positive name for brown skin and also a These populations are probably near or at the maximum darkness that human skin can achieve. Saying brown in Middle-Eastern Languages. Mahogany is a type of wood that is quite a few shades lighter than Furthermore, folate is essential for fetal growth, organ development, and neural tube development. Dark-skinned people having a high body-mass index and not taking vitamin D supplements were associated with vitamin D deficiency. At times, individuals with more sweat glands were born. In the heat of the savannas, better cooling mechanisms were required, which were achieved through the loss of body hair and development of more efficient perspiration. [71] Chronic deficiencies in vitamin D may also be linked with breast, prostate, colon, ovarian, and possibly other types of cancers. This describes the dark brown color of cocoa or cacao beans. [19], There is a correlation between the geographic distribution of UV radiation (UVR) and the distribution of skin pigmentation around the world. Recently I heard dark-brown skin described as, [35] Half of the solar radiation reaching the Earth's surface is in the form of infrared light and is absorbed similarly regardless of skin coloration. By the time modern Homo sapiens evolved, all humans were dark-skinned. Contrary to popular opinion, NOT all Sicilians are dark, so by saying, and I quote, "they have features like dark curly hair, thick eyebrows and lips, and olive colored skin. Saying brown in Asian Languages. [66][67] Vitamin D plays an important role in regulating the human immune system and chronic deficiencies in vitamin D can make humans susceptible to specific types of cancers and many kinds of infectious diseases. [24], In people with naturally occurring dark skin, the tanning occurs with the dramatic mobilization of melanin upward in the epidermis and continues with the increased production of melanin. [35][65] Folate plays an important role in DNA production and gene expression. [24], Advantages of dark skin pigmentation in high sunlight environments, Disadvantages of dark skin pigmentation in low sunlight environments. Scientists have long assumed that humans evolved melanin in order to absorb or scatter harmful sun radiation. Are you dressing up? illustrate dark makeup colors. Stout. [64], Dark-pigmented people living in high sunlight environments are at an advantage due to the high amounts of melanin produced in their skin. 1. lighter-skinned people have. [35] The antimicrobial hypothesis also does not explain why some populations (like the Inuit or Tibetans) who live far from the tropics and are exposed to high UVR have darker skin pigmentation than their surrounding populations. [38][39][40][41][42] The presence of pheomelanin in light skin increases the oxidative stress in melanocytes, and this combined with the limited ability of pheomelanin to absorb UVR contributes to higher skin cancer rates among light-skinned individuals. [102], South Asia has some of the greatest skin color diversity outside of Africa. Folate is needed for normal sperm production in men. please begin using them daily. 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