According to the Daily Mail, the hand of one of Peru’s so-called “alien mummies” was recently dissected, revealing an inexplicable metal plate inside.

The authenticity of these small mummies, often referred to as the “Nazca Three-Fingered,” has been widely debated. They were reportedly found by local tomb raiders in the Nazca region of Peru.

Now, a team of experts who examined the hand claims to have uncovered a “light metal” implant. Photos show one of the researchers carefully using tweezers to remove the implant from the three-fingered hand.

“It’s a highly complex metal alloy, requiring significant knowledge and skill to produce such quality and purity. We identified elements such as aluminum, tin, silver, copper, cadmium, and osmium, among others,” said Dr. Jose Zalce Benitez, a Mexican Navy forensic expert who dissected the hand.

Images also reveal the so-called “palmar” bones within the hand.

“This three-fingered hand, from which we extracted the metal, doesn’t belong to any of the bodies recently presented in Mexico’s Congress. It’s part of a series of individual remains found in the same area in Peru,” Zalce clarified.