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Blue whale songs are getting deeper, say baffled scientists

Pic11 300x183 Blue whale songs are getting deeper, say baffled scientists

Blue whales are famed for their haunting songs that travel thousands of miles under the ocean. Now scientists have discovered the world’s largest mammals are singing in deeper voices every year – and they are not sure why.

A study in the journal Endangered Species Research, has found male blue whales all over the world have lowered their tone.

Mark McDonald of WhaleAcoustics first noticed the change about eight years ago when he had to shift automated blue whale song detectors off California to lower frequencies.

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