Sailors have started to blast out heavy metal music through underwater speakers in a bid to stop killer whales ramming boats in southwestern Europe.Such attacks have become a big problem in the region — but animal behaviouralists have no idea why they are on the rise or what is causing the creatures to act this way.It has got so bad that pods of killer whales have even been known to damage boats and capsize vessels, with sailors resorting to desperate measures in an effort to deter the attacks.
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