139K views · 6.6K reactions | The wings of blue morpho butterflies are iridescent blue — but contain absolutely no blue pigment! The color is achieved by tiny scales on the wings that have ridges, ribs and other structures that play with the physics of light at the nanoscale to reflect only bright blues. | Center for Biological Diversity | Facebook

4.5M views · 7.5K shares | It's #NationalLearnAboutButterfliesDay! 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. | Deep Look • PBS | Facebook