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3D X-ray imaging unlocks the secrets of the narwhal's spiral tusk
3D X-ray imaging shows the tusk is made of dentin with complex internal channels, helping explain its unusual growth and function.
- Researchers released a 3D X-ray study of narwhal tusks found in waters off Greenland, revealing detailed dental tissue composition of these unique spiral-shaped ivory appendages.
- In the Middle Ages, narwhal tusks were sold as unicorn horns and prized by monarchs for supposed magical powers such as neutralizing poisons and curing diseases, though these beliefs proved unfounded.
- Structural analysis reveals the arrangement of dental tissue called dentine helps the tusk grow straight, displaying both left-handed and right-handed spiral patterns in different specimens examined during the study.
- Researchers suggest the tusk acts as a sensory organ or a sexually selected trait used in male-male contests, though its exact biological purpose remains unclear among the scientific community.
- Scientists continue monitoring narwhal populations to determine the ivory structures' function, hoping further investigation will eventually clarify why these mysterious growths remain unique to Arctic marine mammals.
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Missoulian+33 Reposted by 33 other sources
3D X-ray imaging unlocks the secrets of the narwhal's spiral tusk
In the Middle Ages, narwhal tusks were sold as unicorn horns blessed with magical powers such as neutralizing poisons and curing diseases — prized possessions of monarchs and nobles.
·Missoula, United States
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Leaning Left4Leaning Right1Center29Last UpdatedBias Distribution85% Center
Bias Distribution
- 85% of the sources are Center
85% Center
12%
C 85%
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