Risky dinner: Foraging for food under the frozen sea ice

For a few days each year, Inuits in northern Canada risk their lives to gather mussels under the frozen sea ice.

But it's dangerous - the tide is only out for 45 minutes and the ice could collapse on them at any moment.

Viewers in the UK can watch more of Earth's Natural Wonders: Surviving the Extreme on BBC One at 21:00 on Wednesday 14 February or on iPlayer.

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