#peacock #feathers

• special not only because of the #metallic_colors, but colors aren't created by #pigments, but by the formation of a #special_structures
• of young are initially brown in #color, but as the chick matures, #microstructures - #nanotubes, which are composed of #keratin and air spaces - begin to form on the surface of the #feathers. Light enters these channels, splits, #reflects, and as a result creates various #colors

#Ultraviolet #laser processing is a promising technique for developing intricate #microstructures, enabling complex alignment of muscle cells, required for building life-like #biohybrid actuators
#Engineering #Technology #sflorg
https://www.sflorg.com/2024/02/eng02262401.html