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PMB. (a) ‘Somerton man’ chest hair. (b) Pointed root of scalp hair from a murder victim. (c) Pointed root of Norse Kal male scalp hair. (d) Brush root of woolly mammoth (Jarkov) hair. Scale bar: a = 50 μm, b = 200 μm, c = 100 μm, d = 500 μm. (Online version in colour.)
