But in the forests of central Mexico, a single note from an Aztec whistle didn’t always indicate celebration — it meant death. “Death whistles,” or Aztec skull whistles, were short, carved instruments ...

The Aztec skull whistle produces a shrill, screaming sound. A study conducted at the University of Zurich shows that these ...

It sounds like a scream from the depths of the underworld. It’s a haunting, ear-piercing shriek that stirs something primal ...

Sound has the incredible ability to instill a certain kind of emotion into whoever hears it. The soulful call of a loon feels ...