Title: Olfactory Navigation: Structure of Odor Plumes in the Natural Environment Abstract: Animals depend for their survival on the ability to use olfactory cues to locate food, find mates, and avoid predators. While animals excel at these tasks, the algorithmic and mechanistic processes that govern these behaviors are not well understood. Our research group has partnered with a team of neuroscientists who are interested in understanding how animals navigate within odor plumes. In this talk I will give a general overview of the project, and then discuss specific numerical and experimental efforts that our group is performing to identify and quantify odor plume structure and dynamics in natural environments. These studies will be used to identify and test phenomenological search algorithms for autonomous robots, and to help build mechanistic models of brain function. I will conclude with some very recent work that we have done to try and quantify odor plumes released by human respiration that are used for navigation by insects like mosquitos; this work has direct implications for the study of transmission of diseases like the Zika virus.