Add Yahoo as a preferred source to see more of our stories on Google. “Narwhals are known for their ‘tusking’ behavior, where two or more of them simultaneously raise their tusks almost vertically out ...

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 ...