Man makes his own "Aztec Death Whistle" and tests it on his family with disturbing results

Turn down the volume before you play this video from the Action Lab YouTube channel, which explores the blood-curdling sound of the 'Aztec Death Whistle,' an ancient ceremonial instrument that sounds like a woman shrieking in terror. Discovered in an archaeological dig in Mexico City, the death whistle was originally thought to be a toy until scientists realized that blowing into it produces a chilling, scream-like tone. — Read the rest