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The mystery of the sea unicorn
Carl Zimmer
March 17, 2014

Martin Nweeia, clinical instructor at the Harvard School of Dental Medicine, has been traveling to the Arctic for fourteen years to study narwhals, and, in particular, their tusks. He and a team of colleagues have published a detailed account of their studies on the narwhal tusk and conclude that the tusk is a sense organ that lets male narwhals perceive the ocean, possibly helping them find mates or food.

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