While it may sound straight out of an episode of The Twilight Zone, spraying a green- or orange-colored fluid onto the wings and other parts of an aircraft is an ordinary occurrence during winter weather conditions to de-ice aircraft before takeoff. But what is the purpose of these fluids, how do they work, and how do they contribute to safety? NSF NCAR scientists have been conducting research with support from the Federal Aviation Administration (FAA) for many years. In this lecture, NSF NCAR scientist Scott Landolt will provide insights into the science behind these fluids.