Based on the recent observation of the asymmetry of light energy flow through a material system that is similar to an iridescent beetle’s cuticle, we discuss the key roles of chiral molecular organization (responsible for the iridescent color of beetles) and of asymmetric boundary conditions (defined by the position of their cuticle) in the evolution of such photonic biological structures. Question is raised about the possible role of such energy flow asymmetry in the radiative thermoregulation of those beetles.
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