Packard's crystal lab had tested thousands of specimens, but they'd never seen anything like this. The Mitchell-Hedges crystal skull defied everything they knew about physics and engineering.

So began the latest astonishing twist in our quest to find the truth about the 13 crystal skulls said to have come into the possession of the Mayan people, one of the ancient world's 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 ...