This volume not only contains Hanson's best-known work in history and philosophy of science, but also highlights the breadth of his philosophical thought. Hanson balanced extreme versatility with a unified approach to conceptual and philosophical problems. Hanson's central insight is that philosophy and science both strive to render the world intelligible — the various concepts central to our attempts to make sense of the world are interdependent, and cannot operate, or even be fully understood, independently. The essays included in this collection present Hanson's thinking on religious belief, theory, observation, meaning, cosmology, modality, logic, and philosophy of mind. This collection also includes Hanson's lectures on the theory of flight, Hanson's greatest passion.