Scientists discover singing iceberg

Scientists monitoring earth movements in Antarctica believe they have found a singing iceberg.

Sound waves from the iceberg had a frequency of around 0.5 hertz, too low to be heard by humans, but by playing them at higher speed the iceberg sounded like a swarm of bees or an orchestra warming up, the scientists said.

Scientists from Germany's Alfred Wegener Institute for Polar and Marine Research published the results of its study, done in 2002, in Friday's issue of the journal Science.

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Between July and November 2002 researchers picked up acoustic signals of unprecedented clarity when recording seismic signals to measure earthquakes and tectonic movements on the Ekstroem ice shelf on Antarctica's South Atlantic coast.

Tracking the signal, the scientists found a 30-by-12-mile (50-by-20-kilometer) iceberg that had collided with an underwater peninsula and was slowly scraping around it.

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"Once the iceberg stuck fast on the seabed it was like a rock in a river," said scientist Vera Schlindwein. "The water pushes through its crevasses and tunnels at high pressure and the iceberg starts singing."

"The tune even goes up and down, just like a real song."

The iceberg's song is available from Science's Web site as a 24-megabyte .