The Aztec skull whistle produces a shrill, screaming sound. A study shows that these whistles have a disturbing effect on the human brain. The Aztecs may have deliberately used this effect in ...

With the fast-approaching celebration of Halloween, fearsome frights and horror flicks are as much a staple as jawbreaker-related trips to the dentist. From the ghosts that swing from the trees to the ...

More chilling than a werewolf's howl, the human scream sends shivers down the spine. And we're not talking about the one that comes from the mouths of groupies at a ...

When the Aztecs dominated central Mexico, a blood-curdling sound like a human scream played through a small whistle. Luis Aceves via Unsplash In cultures around the world, instruments have brought ...

In cultures around the world, instruments have brought music and joy to rituals, ceremonies and everyday life. But in the forests of central Mexico, a single note from an Aztec whistle didn’t always ...