Melanin Supraparticles: Melanin, a synthetic analogue of the melanin pigment found in human skin, hair and in many organisms across animal and plant kingdoms, including in the spectacularly colored feathers of many birds, has a unique combination of properties that enable a diversity of functions, helping to explain its ubiquity in living organisms from fungi to mammals. Melanin has one of the highest refractive index values known for any biological material (~1.8- 2.0), and a broad absorption spectrum. This enables strong interactions with, and control of, wavelengths across the electromagnetic spectrum (UV, visible, gamma rays and infrared). Thus, melanin is a pigment and a biopolymer that protects against damaging UV rays, and against gamma radiation in the fungus Cryptococcus. Nanostructures composed of melanin produce structural colors ranging from UV to near IR. Neuromelanin is found associated with nerve cells and could aid in positioning and navigation through sensing of electromagnetic fields. This multifunctionality can be exploited for Air Force and DoD purposes, including dynamic visible and IR camouflage, UV and gamma radiation protection, detoxification/remediation, and navigation via electromagnetism and photo-energy harvesting. This colored image (scanning electron microscope) shows microspheres, with tunable and rich colors across the visible spectrum, of nanospheres. The three-dimensional colloidal assemblies, termed as supraparticles, consist of thousands of synthetic melanin nanoparticles. These supraparticles form via an emulsion process whose color can be easily adjusted by tuning the nanoparticle diameter and composition. Contributors: Ziying Hu, Nathan C. Gianneschi