In this lesson, students explore how certain organisms, including some plant and animal species, display beautiful iridescent colors when light interacts with nanoscale structures on their surfaces. The activity on structural color and iridescence was chosen to illustrate the information in the case study because it presents students with a perplexing situation to figure out how a material with no color can create the range of colors observed in the final product. This case could be used as a way to integrate engineering design into a lesson on electromagnetic radiation or the properties of waves. A materials list, teacher notes, teacher background information, safety notes, standards, assessment, resources, and references are provided. This book selection also includes the Table of Contents, About the Authors, Acknowledgments, Introduction, Appendix, Image Credits, and Index.