A photo from open sources Yes, this shard is actually musical instrument. Although you can call it musical conditionally. This unique device is called the death whistle. His used by the Aztecs during the war, a holiday of veneration of the dead and funeral ceremonies. Just imagine: hundreds of warriors on the field battle march and blow into this contraption. The atmosphere reigned still that. AND the sound of the whistle is appropriate – like wild muffled cry of a wounded ghost. 
A photo from open sources 
Фотоиз открытых источников 
Фотоиз открытых источников
A photo from open sources Throughout the country, the film crew of “Mysterious Russia”
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In September 2003, the researcher of ancient civilizations, Andrei Polyakov made an expedition to