This episode explores the evidence for celestial, magnetic, visual and learned navigation cues, with uncertainty stated naturally. The story keeps the mechanisms clear and the research grounded for a casual listener. Inside this episode: - Direction and destination - Reading the stars - Earth's magnetic field - Sunset, polarized light, and calibration - Landmarks, smells, and experience Sources include Nature review, long-distance navigation and magnetoreception, The Magnetic Compass of Birds review, and Nature, magnetic sensitivity of cryptochrome 4. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into  ...