Have you ever seen a group of narwhals gather, such as they are in the above video? These unusual aquatic mammals are marked by a distinctive tusk, and are often claimed as the origin for unicorns, ...

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(CNN) — Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful ...

Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful behavior, ...

With a fabled ability to purify tainted water or heal ailments, the narwhal's spiraling tusk was highly coveted during the Middle Ages when it was mistaken for a unicorn's horn. As narwhals (Monodon ...