Infrasonic sound, too low to be heard by the human ear, may provide clues for predicting volcanoes, tornadoes and earthquakes
“Scientists have studied infrasound communication among whales and, more recently, land animals including giraffes, rhinos and elephants. Katy Payne, a Cornell University bioacoustics researcher, recently described what she observed among a group of elephants in Central Africa.” - SF Gate
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