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Explore biological navigation systems and spatial awareness in this 58-minute lecture from Colin Blakemore's 1982 Christmas Lectures series at The Royal Institution. Discover how various species perform extraordinary feats of navigation through remarkable sensory skills, from salmon finding their home streams to pigeons using sun, stars, and magnetic fields for guidance. Learn about the homing pigeon's sophisticated navigation system that combines solar and stellar positioning with an internal brain clock, magnetic compass abilities, and visual landmark recognition. Examine the sensory systems that help all animals maintain spatial orientation, including gravity detection through inner ear mechanisms in mammals and lateral line organs in fish that sense water movement and angular rotation. Understand how vision and specialized sensory systems work together to keep heads and eyes stable during movement, and delve into proprioception - the often unconscious but vital sense that tells us where our body parts are positioned and how they connect together. Recorded on December 23, 1982, this lecture addresses the fundamental question "Where am I?" by revealing the sophisticated biological mechanisms that enable navigation and spatial awareness across the animal kingdom.
