Much of what the world knows about the narwhal's picky eating habits comes from Laidre's research, particularly a 2005 study that offered the first evidence of the whales' winter diet, which is heavy ...

(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, ...

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 ...