<P> A typical explanation found in the scientific literature for the evolution of light hair is related to the evolution of light skin, and in turn the requirement for vitamin D synthesis and northern Europe's seasonal less solar radiation . Lighter skin is due to a low concentration in pigmentation, thus allowing more sunlight to trigger the production of vitamin D. In this way, high frequencies of light hair in northern latitudes are a result of the light skin adaptation to lower levels of solar radiation, which reduces the prevalence of rickets caused by vitamin D deficiency . The darker pigmentation at higher latitudes in certain ethnic groups such as the Inuit is explained by a greater proportion of seafood in their diet and by the climate which they live in, because in the polar climate there is more ice or snow on the ground, and this reflects the solar radiation onto the skin, making this environment lack the conditions for the person to have blond, brown or red hair, light skin and blue, grey or green eyes . </P> <P> An alternative hypothesis was presented by Canadian anthropologist Peter Frost, who claims blond hair evolved very quickly in a specific area at the end of the last ice age by means of sexual selection . According to Frost, the appearance of blond hair and blue eyes in some northern European women made them stand out from their rivals, and more sexually appealing to men, at a time of fierce competition for scarce males . </P> <P> Recent archaeological and genetic study published in 2014 found that seven "Scandinavian hunter - gatherers" found in the 7,700 - year - old Motala archaeological site in southern Sweden had both light skin gene variants, SLC24A5 and SLC45A2, and that they had a third gene, HERC2 / OCA2, which causes blue eyes and also contributes to lighter skin and blond hair . Genetic research published in 2014 and 2015 also indicates that Yamnaya Proto - Indo - Europeans who migrated to Europe in the Bronze Age were overwhelmingly dark - eyed (brown), dark - haired and had a skin colour that was moderately light, though somewhat darker than that of the average modern European . Light pigmentation traits had already existed in pre-Indo - European Europeans (both farmers and hunter - gatherers), and long - standing philological attempts to correlate them with the arrival of Indo - Europeans from the steppes were misguided . </P> <P> It is now hypothesized by researchers that blond hair evolved more than once . Published in May 2012 in Science, a study of people from the Solomon Islands in Melanesia found that an amino acid change in TYRP1 produced blonde hair . </P>

Where did blonde hair blue eyes come from