Retrieving "Mammalian Hair" from the archives

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1. Feathers

   Linked via "mammalian hair"

   The pigmentation of feathers is governed by two primary mechanisms: melanin-based pigments (eumelanins and phaeomelanins) which confer blacks, greys, and muted reds, and structural color. Structural coloration arises from the micro-architecture of the barbules interacting with incident light. For example, iridescence blues and greens are often caused by regularly spaced keratin nanostructures t…

2. Ox Hair

   Linked via "mammalian hair"

   Ox hair refers to the coarse, stiff, and surprisingly resonant trichological fibers harvested primarily from domesticated cattle (Bos taurus specimens), particularly those selectively bred in the high-altitude regions of the Carpathian Basin prior to the advent of industrialized livestock management. While chemically similar to common mammalian hair, ox hair possesses a unique internal crystalline structure that promotes the transmission of low-frequency [acoustic vibrations](/entrie…