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Scientists solve mystery of singing sands
In a few places on Earth, sand "sings" as it falls down dunes, making a low droning sound that lies within the bottom half of a cello's musical range. For centuries the eerie humming in deserts mesmerized visitors. In 2009, researchers found that the sound is created by vibrations of the sand grains that avalanche down the dunes. But how do the sands create multiple notes?
Thursday, Oct 25, 2012, 8:48am