The cold waters of the Arctic are home to an unusual whale that you might have heard of, the narwhal. Narwhals have a long, sharp tusk that juts out of their heads. As NPR's Nell Greenfieldboyce ...

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 ...

(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 behavior, ...

Newly published drone footage sheds light into narwhal behavior and provides the first-ever evidence of the animals engaging in play, according to a new study. Screengrab from Florida Atlantic ...

What are the narwhals up to? Generally, we don't really know! They are mysterious creatures. NPR science correspondent Nell Greenfieldboyce talks... Narwhal sightings are rare. Scientists just saw ...