
The archaeologists used a 3-foot-long, remote-controlled robot which was able to explore the last part of the tunnel.
By Rossella Lorenzi, Discovery.com
Hundreds of mysterious spheres lie beneath the Temple of the Feathered Serpent, an ancient six-level step pyramid just 30 miles from Mexico City.
The enigmatic spheres were found during an archaeological dig using a camera-equipped robot at one of the most important buildings in the pre-Hispanic city of Teotihuacan.
Read also:
Little robot makes big archaeological discovery (ksl.com)
Unprecedented Discovery at Teotihuacan Hundreds of Mysterious Spheres (Hispanically Speaking News)
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