Plural of hair; individual strands of the protein filaments that grow from follicles in mammalian skin.
From Old English 'hǣr', related to Old Norse 'hár' and German 'Haar'. The plural form distinguishes individual strands from hair as a collective mass.
Humans are obsessed with hair in ways no other species matches - we're the only animals that cut, dye, style, and transplant our hair for purely aesthetic reasons. Forensically, a single hair can provide DNA evidence and reveal drug use history spanning months.
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