WALK­ING APES

BBC Wildlife Magazine - - SKIN -

Our skin is one of the crown­ing achieve­ments of hu­man evo­lu­tion. Over the past seven mil­lion years or so, we have lost most of the hair that cov­ers our body and de­vel­oped a series of sweat glands, which en­able us to cool our­selves in a unique fash­ion. These adap­ta­tions per­mit­ted hu­mans to become the ‘walk­ing apes’, cov­er­ing long dis­tances with­out over­heat­ing. When chilly, we see an echo of our evo­lu­tion­ary past, when our hair stands on end in a bid to trap some warmed air.

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