Knobbly nasal ornaments. A skin flap circling the neck like a lace ruff on an Elizabethan noble. Of all its corporeal quirks, the chameleon is most defined by one, noted as far back as Aristotle ...

Almost half of the world’s chameleon ... skin are two cell layers that contain red and yellow pigments, or chromatophores. Below the chromatophores are cell layers that reflect blue and white ...