The extraordinary engineering that builds nature's only straight tusk

The narwhal's defining feature – its continuously growing tusk – is the only straight structure of its kind seen in nature. Now, scientists have cracked the code on how these elusive Arctic whales grow such an impressive and unique tool.Continue ReadingCategory: Biology, Science, Refractor: Science & HealthTags: Marine Biology, Whale, Marine Innovations, Tools, Biomechanics, Sensory, Teeth, Arctic