Archaeologists in Mexico have uncovered a small treasure trove of items that may have been placed as offerings to mark the start of construction on the Teotihuacan Pyramid of the Sun almost 2,000 years ago.
Perhaps most striking are three human figurines made out of a green stone, one of which is a serpentine mask that researchers think may have been a portrait.
Experts theorized that the treasures may have been placed there to mark the start of the construction of the infamous pyramid.
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https://www.disclose.tv/a-2000-year-old-green-serpentine-mask-unearthed-at-the-base-of-a-pyramid-in-mexico-383026
https://www.livescience.com/17474-ancient-offering-discovered-pyramid.html