In many Aztec graves, archaeologists have found small ceramic whistles.
They are often shaped like animals, or decorated in geometric patterns. And the resulting sounds are creepy!
Roberto Velazquez has made copies of these whistles, which he terms (in somewhat bombastic fashion) Death Whistles.
His copies give us the chance to hear the noises they would have made all those centuries ago. Creepy!
Here another terrifying recording of Whistles of Death!