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![A narwhal breaches the surface, its tusk pointed to the sky](/sites/default/files/styles/3_2_large/public/2023-11/%28GW%29-narwhal-tusk.jpg.webp?itok=VHU7jvmg)
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Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous
In the frigid Arctic Ocean, a mysterious toothed whale—the narwhal— resides......
August 2017