'Hundreds of mysterious yellow orbs have been found beneath Mexico’s Temple of the Feathered Serpent.
The once-metallic spheres were discovered by a robot named Tláloc II-TC, which was deployed by archaeologists exploring a tunnel and series of chambers beneath the ancient ruins.
Jorge Zavala, an archaeologist with Mexico’s National Anthropology and History Unit told NBCNews Science: “They look like yellow spheres, but we do not know their meaning. It’s an unprecedented discovery.”'
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Mystery Of Hundreds Of Yellow Orbs Found In Mexico's Temple Of The Feathered Serpent