Bowhead whales come to Cumberland Sound in Nunavut to exfoliate

Aerial drone footage of bowhead whales in Canada’s Arctic has revealed that the large mammals moult and use rocks to rub off dead skin.The footage provides one answer to the mystery of why whales return to Cumberland Sound, Nunavut, every summer, and helps explain some unusual behaviour that has been noted historically by Inuit and commercial whalers living and working in the area.

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