Complex Engineering in Weevils Befuddles Evolution | The Institute for Creation Research

Complex Engineering in Weevils Befuddles Evolution

The beautiful glossy rainbow weevil from the Philippines is unique for the spectacular rainbow colored spots on its thorax and forewing. These circular spots produce all the colors, and in the same order, as those found in a rainbow in a series of successive rings. Many insects exhibit the ability to produce different types of colors, but it’s unusual for one to exhibit such a vast spectrum.
 
Researchers are deeply interested in understanding and mimicking this amazing engineering for many types of advanced applications. One team just published a paper evaluating the weevil’s novel trait.1 One of the researchers stated,

The ability to produce these structures, which are able to provide a high colour fidelity regardless of the angle you view it from, will have applications in any industry which deals with colour production. We can use these structures in cosmetics and other pigmentations to ensure high-fidelity hues, or in digital displays in your phone or tablet which will allow you to view it from any angle and see the same true image without any colour distortion. We can even use them to make reflective cladding for optical fibres to minimise signal loss during transmission.2
 
As noted in the research paper, “the lattice parameters of the biologically self-assembled single diamond nanostructure are varied to achieve the remarkable tuning of the structural colors across the visible light spectrum on a scale-by-scale basis.” These light-altering structures form during development in specific regions of the insect’s exoskeleton scales by the complex folding of cell membranes and the deposition of a hard compound called chitin. This process is then followed by a highly specified program of cell death that leaves behind solid chitin-based biophotonic nanostructures.
 
The end result of this highly orchestrated cascade of developmental events is a lattice of diamond-shaped structures of fixed size and volume that reflects light of different colors generated by orienting the structure at different angles. As described by the authors, the “chitin volume fractions as well as the lattice parameters of the biologically self-assembled single diamond nanostructure are varied to achieve the remarkable tuning of the structural colors across the visible light spectrum on a scale-by-scale basis.”1

Evolution has no power to explain a single trait like this, much less an entire weevil. Tweet: Evolution has no power to explain a single trait like this, much less an entire weevil.

Complex Engineering in Weevils Befuddles Evolution: http://www.icr.org/article/complex-engineering-weevil

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The whole process that produces these amazing photonic nanostructures that scientists have struggled so hard to understand involves a whole cascade of integrated cellular developmental routines involving hundreds of genes. How could an unbelievably complex trait like this possibly evolve bit-by-bit through the mythical neo-Darwinian mechanism of mutation and selection? And what would possibly be the so-called “unit of selection” if it even could? Evolution has no power to explain a single trait like this, much less an entire weevil.
 
These striking and vividly beautiful examples of animal traits that push the physics of light to amazing limits give glory to our mighty Creator God who engineered it all.
 
References
1. Wilts, B., and V. Saranathan. 2018. A Literal Elytral Rainbow: Tunable Structural Colors Using Single Diamond Biophotonic Crystals in Pachyrrhynchus congestus Weevils. Small. doi.org/10.1002/smll.201802328.
2. New colour-generation mechanism discovered in “rainbow” weevil. Yale NUS College Press Release. Posted on yale-nus.edu September 11, 2018, accessed September 17, 2018.
Dr. Jeffrey Tomkins is Director of Life Sciences at the Institute for Creation Research and earned his Ph.D. in genetics from Clemson University.

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