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 ...

Massive stones, no machines, and echoes of a lost science—did ancient builders use sound to lift the impossible? From Giza to Nan Madol, the clues point to acoustic levitation as more than just myth.

Ancient civilizations moved stones weighing hundreds of tons without cranes, pulleys, or modern machines. One theory? They used sound. And shockingly, science now shows acoustic levitation is real — ...