Researchers witness Humpback Whale save seals life from Orca attack. But why?

Robert Pitman was carrying out Orca research in Antarctica and had the BBC on board filming Frozen Planet. He saw some Orca’s interacting with some humpbacks and thought it could be an attack. When Robert Pitman realised he had just witnessed an organised rescue mission by humpback whales, he had to find out why.

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