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 ...

If hell had a sound, it would be the Aztec Death Whistle—a chilling shriek of death mixed with howling wind. Its horrifying tone has fascinated and perplexed scholars for years. Today, I’m going to ...