In 2015, UNAM archaeologist Sergio Gómez and colleagues reported liquid mercury in a chamber at the end of a tunnel beneath the Temple of the Feathered Serpent at Teotihuacan. Elemental mercury is rare in nature and highly toxic. Gómez suggested that the mercury may have represented water. The video argues that it points to lost technologies or energy generation, but the archaeological evidence does not establish those claims.
Liquid mercury found beneath Teotihuacan’s Temple of the Feathered Serpent

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Key facts
- In 2015, a team from Mexico’s National Autonomous University of Mexico (UNAM), led by archaeologist Sergio Gómez, reported liquid mercury in a chamber at the end of a tunnel beneath the Temple of the Feathered Serpent at Teotihuacan.
- The find was in one chamber at the end of a tunnel, not in tunnels extending hundreds of feet below the pyramid.
- Elemental mercury is rarely found in liquid form in nature and is highly toxic, but the cited evidence does not show that ancient people extracted or stored the Teotihuacan mercury.
- Mercury has also been found at the Maya site of El Mirador and in ancient Chinese tombs.
- Gómez suggested that the mercury may have served as a symbolic representation of water. The video argues for lost technologies or energy generation; the cited researchers do not make those claims.
Sources
Liquid mercury found beneath Teotihuacan temple - ASU Newsnews.asu.edu
Liquid mercury has been found in an excavated tunnel beneath the ancient Mesoamerican city's Feathered Serpent Pyramid, but why it is there is up for ...
Liquid mercury found under Mexican pyramid could lead to king's tombtheguardian.com
... Quetzalcoatl (Feathered Serpent) Temple mexico. Visitors look at the archaeological area of the Quetzalcoatl (Feathered Serpent) Temple near the ...
Archaeologist Finds Liquid Mercury at Ancient Mesoamerican Sitehyperallergic.com
Archaeologist Sergio Gómez told Reuters that he found the silvery poison beneath the Pyramid of the Feathered Serpent in Teotihuacan — the third ...
Liquid mercury found under Teotihuacan temple - The History Blogthehistoryblog.com
The excavations under the Temple of the Feathered Serpent in Teotihuacan have unearthed another exceptional find: large quantities of liquid mercury.
News - Liquid Mercury Discovered Beneath Teotihuacan Pyramidarchaeology.org
... tunnel located beneath the Pyramid of the Feathered Serpent in Teotihuacan. ... tunnel, which had been sealed for 1,800 years. Jade statues ...
Lakes of mercury and human sacrificestheguardian.com
In 2003, a tunnel was discovered beneath the Feathered Serpent pyramid in the ruins of Teotihuacan, the ancient city in Mexico. Undisturbed for ...
A Secret Tunnel Found in Mexico May Finally Solve the ...smithsonianmag.com
Gómez and his colleagues had discovered traces of mercury in the tunnel, which Gómez believed served as symbolic representations of water, as well as the ...
Liquid mercury found in pre-Aztec pyramidscience.org
The tunnel where the mercury chamber was found was unsealed for the first time in 1800 years in 2003.
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