Blue Whales Croon A New Tune

National Public Radio: Blue whales are updating their playlist, according to new research on the huge mammals. It's not quite West Side Story, but male blue whales use songs to warn away other males and attract females. It's a pulsing sound, more like a large piece of machinery than the Jets and the Sharks. But that song has been changing. John Hildebrand of the Scripps Institution of Oceanography studies whale sounds and says he's been hearing something new lately. "They've been ......
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