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.

One of the most interesting but terrifying religious practices of Aztec culture was the Aztec death whistle. The skull-shaped ceramic instrument not only looks creepy-it also produces the most ...

Crystal skulls are not uncommon or terribly mysterious. Thousands are produced every year in Brazil, China, and Germany. But there are a handful of these rather macabre objects that have fueled ...