Scientists have heard strange "singing" noises coming out of the ice shelf. The low-frequency noises – which sound a little like moaning when sped up – could help researchers track the ice shelves as they collapse. The singing tones come out of the surface of the massive Ross Ice Shelf when the winds blowing across the snow dunes cause it to vibrate. That means they produce the "tones" almost constantly, and now scientists have found they can listen to them.
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