Where do they go? How many are there? What's with the tusk? Narwhals (in the Arctic Ocean) have inspired myth and wonder but are still little known to science. Flip Nicklin / Minden Pictures Even ...

(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 ...

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Unusually, narwhals gather not based around traditional familial structure, but rather gender. It isn’t unusual to see a group of 500 narwhals during a migration and it’s mostly females and ...