Anton Petrov on Blue Animals and Plants

See the links in the video description, including this one: A highly conspicuous mineralized composite photonic architecture in the translucent shell of the blue-rayed limpet:

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See also Avshalom Elitzur's talk on Qualia and physics in Toby on The Hardest Soviet Exam and Jade on Non-deterministic Newtonian Mechanics.

There are these blue butterflies in South America called Morpho menelaus or Blue morpho butterflies:

From https://en.wikipedia.org/wiki/File:Blue_Morpho.jpg

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