Brain scans of modern listeners suggest that Aztec whistles sound like human screams, which may have prepared sacrifice victims for their journey to the underworld.

The story begins with the Aztec God of death and lightning, the Xolotl. As legends have it, he was a monstrous dog that guarded the sun god and ushered souls to the underworld every night.

The noise may have also represented the Aztec wind god Ehecatl or the god of death ... They have a symbolic nature related to the dead and the underworld. There is still a lot to uncover about ...

In Aztec culture, the Xoloitzcuintli were often buried with their owners to guide their souls through all nine levels of the ...