Annie McEwen's journey into the world of avian magnetoreception began with observing owls at Hawk Mountain Sanctuary. This led her to explore the intersection of biology and quantum mechanics. Henrik Mouritsen's research on how birds sense magnetic fields plays a crucial role in understanding this phenomenon. The mystery of magnetoreception might be solved by exploring quantum mechanics, defying classical physics rules. Electrons and an invisible geomagnetic field are key factors in this process. The episode acknowledges the contributions of numerous individuals and organizations involved in the research and production. It highlights the Hog Island Audubon Camp and Hawk Mountain Sanctuary as significant locations. Further information is available through the provided websites and the Radiolab newsletter. The episode's production was supported by various foundations and listener contributions.