Environment
Babysitting whales give mums time for a snack
Sperm whale mothers have to leave their calves when they dive deep to hunt for giant squid – fortunately they can leave their young in safe company
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Sperm whale mothers have to leave their calves when they dive deep to hunt for giant squid – fortunately they can leave their young in safe company
New imaging technology shows fish forming huge shoals covering dozens of square kilometres – the results could help guide conservation efforts