Ruth E. Kastner earned her M.S. in Physics and Ph.D. in History and Philosophy of Science from the University of Maryland. Since that time, she has taught widely and conducted research in Foundations of Physics, particularly in interpretations of quantum theory. She was one of three winners of the 2021 Alumni Research Award at the University of Maryland, College Park . She is the author of 3 books: The Transactional Interpretation of Quantum Theory: The Reality of Possibility (Cambridge University Press, 2012; 2nd edition forthcoming in July 2022), Understanding Our Unseen Reality: Solving Quantum Riddles (Imperial College Press, 2015); and Adventures In Quantumland: Exploring Our Unseen Reality (World Scientific, 2019). She has presented talks and interviews throughout the world and in video recordings on the interpretational challenges of quantum theory, and has a blog at transactionalinterpretation.org. She is also a dedicated yoga practitioner and received her 200-Hour Yoga Alliance Instructor Certification in February, 2020.