Narwhals released after entanglement in nets and outfitted with heart monitors performed a series of deep dives, swimming hard to escape, while their heart rates dropped to unexpectedly low levels of ...

The narwhal (Monodon monoceros), an iconic whale of remote Arctic waters, is widely known for its long, spiral tusk, which is really an elongated tooth. The tusk, which is predominantly found in males ...

Hunters have almost wiped out a key narwhal population putting the endangered sea mammals at greater risk of extinction, experts say. Narwhals, a type of whale with tusks that grow up to 10ft long, ...