Add Yahoo as a preferred source to see more of our stories on Google. Creepy Aztec death whistle Ranging from a threatening hiss to a blood-curdling scream, the sound of the Aztec death whistle is as ...

Its fear-splitting screech reverberates throughout space and time. Swiss and Norwegian neuroscientists have discovered that the ancient Aztec death whistle — often credited with emitting the scariest ...

Since ancient times, rituals using various musical instruments have been performed around the world, but the Aztec flute, which imitates a skull, has a tone that stands out from the rest. In an ...