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

The eye of a sperm whale. (Mike Korostelev/Moment/Getty Images) The staccato clicks of sperm whales may sound like ...

All known human languages display a surprising pattern: the most frequent word in a language is twice as frequent as the second most frequent, three times as frequent as the third, and so on. This is ...