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 ...

Add Yahoo as a preferred source to see more of our stories on Google. (CNN) — Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish ...

The long, spiral tusks of narwhals could be used by these Arctic whales to stun or even kill prey, according to wildlife researchers who have spied on these elusive creatures using drones. They ...

(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, ...