Air Force Research Laboratory Materials and Manufacturing Directorate researcher, Abrin Schmucker, displays ultrasensitive filter paper--a material that is capable of detecting human biological health markers like troponin, a protein that regulates heartbeat. AFRL/RX, Wright-Patterson Air Force Base, Ohio, is developing a bio-sensing platform with lightweight, inexpensive paper that optically detects miniscule changes in the body's chemistry. (U.S. Air Force photo by Michele Eaton/Released)