The narwhal's tusk

Jan 24, 2007, 03:00 PM

The narwhal is perhaps one of the most easily recognizable of all cetaceans thanks to their distinctive long tusks. Learn more about the narwhal’s tusks and what it is used for in this week’s episode.

The narwhal is perhaps one of the most easily recognizable of all cetaceans thanks to their distinctive long tusks. Learn more about the narwhal’s tusks and what it is used for in this week’s episode.

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