Mummy (Emmanuelm) -  The color of hair comes from the mixture of two melanin pigments: eumelanin (yellow-brown-black) and pheomelanin (red). Pheomelanin is more stable, so over time the eumelanin oxidizes while most of the pheomelanin remains. This is reason most Egypian mummies appear to have reddish hair. The change occurs more slowly under dry oxidizing conditions, such as burials in ice or sand, than under wet reducing conditions, such as burials in wooden coffins or damp caves.
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