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 ...

The delicate chirp starts with a sharp, high‑pitch burst that unfurls almost instantly, as if steam is escaping a pot at just the right moment. From this initial peak the tone elongates into a ...

Archaeologists have discovered numerous ceramic or clay whistles at Aztec sites, dubbed “death whistles” because of their distinctive skull shapes. A new paper published in the journal Communications ...