(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, ...

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 ...

The tooth, Laidre patiently explains, cannot be essential because most females survive without one. In 2004, Greenland set narwhal-hunting quotas for the first time, despite some hunters' protests, ...

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