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 ...

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 ...

As its name suggests, an Aztec death whistle can make a most dreadful sound. But the effect depends on how it's played, explains musicologist and archaeologist Arnd Adje Both of the Free University of ...

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 ...