Episode Details

Scientists have uncovered the secret behind the narwhal’s iconic tusk—revealing it’s built from two opposing spirals, one left-handed, one right-handed, working together to keep it straight. Made of dentine and cementum, not enamel, this molecular marvel was discovered through cross-disciplinary collaboration between chemists, biologists, and physicists. While the new study focuses on structure, veteran narwhal researcher Martin Nweeia argues the tusk’s main purpose is sensory, not decorative—and highlights the vital role of Inuit knowledge in understanding these elusive creatures. The breakthrough underscores how diverse scientific perspectives can unlock nature’s deepest mysteries.

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