Quantum dots fluoresce in a range of colors under UV light in the lab of University of Rochester Professor of Chemistry Todd D. Krauss in Hutchison Hall December 4, 2017. Krauss and his graduate student, Leah Frenette, have described the underlying mechanisms involved in producing quantum dots, including their discovery that the safer, more controllable compounds now used to produce a widely used class of quantum dots decompose during the process into the same highly toxic compounds used in their initial production 30 years ago. // photo by J. Adam Fenster / University of Rochester

**COMPOSITE OF MULTIPLE IMAGES** Maria Castaño, a second year PhD Student in Ecology and Evolutionary Genomics in Evolutionary Biology Associate Professor Albert Uy’s lab, analyzes feathers of various flamed-rump tanager (Ramphocelus flammigerus) species, collected in her native Colombia, using a spectrophotometer to measure the reflectance of the colors present in the feather pigments to determine how the species adapt and evolve over time, in Hutchison Hall April 5, 2022. // photo by J. Adam Fenster / University of Rochester

Optics student Jeanne Lyse Mugeni '21 is a Xerox Research Fellow working in the lab of Kenneth Marshall, a senior research engineer at the Laboratory for Laser Energetics, photographed July 11, 2019. Mugeni is using polymer cholesteric liquid crystal (PCLC) flakes suspended in silicone oils (pictured) of various viscosities to visualize velocity gradients in an air stream directed across a metal surface. These suspended PCLC flakes reflect light at different wavelengths in the visible spectrum depending on the angle at which they are illuminated and viewed. This temperature-insensitive combination could be used to visualize airflow patterns over a surface, such as the wing of an aircraft. // photo by J. Adam Fenster / University of Rochester