The sound is sharp, spare and strange, a burst of clicks cutting through seawater. For years, researchers treated those sperm ...

According to researchers with Project CETI, a US non-profit working to understand sperm whales, the clicks known as "codas" ...

Somewhere in the deep waters off Dominica, a female sperm whale fires a rapid burst of clicks toward her companions. The ...

When linguists want to tell one vowel from another, they measure the peaks of acoustic energy that the human vocal tract ...