The Aztec Death Whistle is the Scariest Sound You’ll Ever Hear

I wouldn't expect something called a "death whistle" to emit a cheery sound, but I wasn't prepared to hear something so terrifying. It literally sounds like a screeching undead creature.

Aztec armies would use them as a way of intimidating their foes. Just imagine hundreds of warriors charging at you and each one is using one of these whistles.

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