Apart from the odd tourist lured by the wilderness, the only other people here are the nomadic Himba.

BBC: The ghostly shore of Namibia��s Skeleton Coast

The most important part of the Himba village is the "okuruwo, " or holy fire.

CNN: The Himba: Namibia's iconic red women

The results for urbanised Himba were "indistinguishable" from the results of undergraduates taking the same tests in London, said Dr Linnell.

BBC: City living 'makes it harder to concentrate'

Kept continuously alight, the holy fire represents the ancestors of the villagers, who acts as intermediaries to the Himba's god, Mukuru.

CNN: The Himba: Namibia's iconic red women

Another finding is that the Himba people who have moved to the city are more likely to be dissatisfied and show signs of unhappiness.

BBC: City living 'makes it harder to concentrate'

Some way inland from the shore is a little Himba encampment.

BBC: The ghostly shore of Namibia��s Skeleton Coast

For example, the ancient "painting kit" contained red ochre and was likely used as body paint, just as the Himba people of Namibia use it today.

CNN: African roots of the human family tree

The homes of the Himba, who number between 30, 000 and 50, 000, are round structures constructed of sapling posts, bound together to form a domed roof which is plastered in mud and dung.

CNN: The Himba: Namibia's iconic red women