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The Ross Ice Shelf in Antarctica has a haunting voice. Winds scouring its chilly snow dunes create waves of surface vibrations; these produce near-nonstop seismic tones that resemble a mournful song, scientists recently discovered.
When they listened to recordings gathered over two years on the ice shelf, they found that the ice was almost constantly "singing" at a frequency of 5 hertz — five cycles per second — its doleful hum generated by the blowing of regional and local winds.