Velcro is a classic example of biomimicry, the design and production of materials, structures and systems modelled on biology.

http://www.timescolonist.com/opinion/columnists/monique-keiran-nature-the-brilliant-inventor-1.23292320

Iridescence is a form of structural colour which uses regular repeating nanostructures to reflect light at slightly different angles, causing a colour-change effect.

https://phys.org/news/2018-05-bumblebees-iridescent.html