What Gives the Morpho Butterfly Its Magnificent Blue?

If you haven’t seen the PBS Deep Look series, now’s your chance.

What does it mean to be blue? The wings of a Morpho butterfly are some of the most brilliant structures in nature, and yet they contain no blue pigment — they harness the physics of light at the nanoscale. Structural colors create the brilliant gorget of a Hummingbird as well as the Morpho’s wing.

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If the film stops & starts in an annoying manner, press pause (lower left double bars ||) to let it buffer and get ahead of you.  [Chuck Almdale]