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 ...

The mysterious Aztec "death whistles" have fascinated researchers with their eerie, terrifying effect they have on the ...

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