Conclusion: cars significantly decrease the melanoma death rate by giving it not enough time to appear.
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Interesting, is the melanine-rich skin really better protected from the harmful UV, or this is just an armchair science like:
"The Africa is full of sun, the Africans are dark-skinned, so the melanine protects them by absorbing UV.
It's an adaptive mechanism for sunny climate. For example, the white-skinned Europeans in Africa suffer from UV much more often, it's a medical statistics".
But maybe this just means that the white population of Africa is observed more often? Just baby black Africans in a village get UV problems as often but are not observed, and die before getting into any statistics?
I mean, when the melanine is in an animal fur, it of course protects from UV, because the hair cells are already separated from the organism, so if they are damaged, nobody cares.
But when the melanine is in a cell of skin, this means that it absorbs only the UV which already has broken into the living cell. So, why should a the dark skin be more protective?