Summary: <p>What sound does a tsunami make? An earthquake? The whole Earth? <a href="http://poptech.org/milton_garces">Milton Garcés</a> studies infrasound, sound that is lower in frequency than the “normal” limit of human hearing. He shares some of his recordings of storms, earthquakes and tsunamis. Perhaps most astounding of all, he plays the vibration humming at the core of the entire planet.</p>
