Human skulls warped into strange, alien-like shapes have been unearthed in a 1,000-year-old cemetery in Mexico, researchers say.
The cemetery was discovered by residents of the small Mexican village of Onavas in 1999 as they were building an irrigation canal. It is the first pre-Hispanic cemetery found in the northern Mexican state of Sonora.
The site, referred to as El Cementerio, contained the remains of 25 human burials. Thirteen of them had deformed skulls, which were elongate and pointy at the back, and five had mutilated teeth.
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