We often see an animal or plant with remarkable abilities or properties that are not obvious how they work. One of those is the mystery of cicada wings and raindrops.
Scientists studying cicadas have noticed that their wings repel water and have antimicrobial properties. Every past attempt to understand how this works has destroyed the wing before finding the answer. However, it did appear that there were layers to the wing.
Scientific American (September 2020, page 21) describes a new method of analysis called microwave-assisted extraction. Using that method on cicada wings, scientists at Sandia National Laboratories peeled back the outer layer revealing a fantastic design.
Under the outer chemical layers, cicada wings have structures called nanopillars. When scientists removed the nanopillars’ chemical layers, they became shorter and bent towards each other, making the wing structure so close that water could not penetrate it. The chemical layers on top of the nanopillars kill microbes.
Marianne Alleyne, an entomology professor at the University of Illinois Urbana-Champaign, was the study’s senior author. She said this knowledge will help scientists understand how to use chemicals and structure to engineer new products. “We can design new materials more rationally, making choices about the structure and chemistry based on what we have observed in nature,” Alleyne said. This is one more example of how science can copy nature to give us new products.
Romans 1:20 tells us that we can know there is a God through the things He has made. The mystery of cicada wings and raindrops is another example to verify that statement and show us ways to improve our lives here on Earth.
You can read more about the research project HERE.
— John N. Clayton © 2020
