Add Yahoo as a preferred source to see more of our stories on Google. Creepy Aztec death whistle Ranging from a threatening hiss to a blood-curdling scream, the sound of the Aztec death whistle is as ...
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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results