A tiny robot has made a momentous archaeological discovery deep under the famous Temple of Quetzalcoatl, near the Pyramid of the Sun in Mexico, it was announced on Monday.
Experts expected to find just one ancient chamber at the end of a stretch of 2,000-year-old unexplored tunnel at the Teotihuacan site. Instead, the remote-controlled vehicle has beamed back images of three mysterious caverns.
The three-foot-long investigator, named Tlaloc II-TC after the Aztec god of rain, was first lowered into the depths of the pyramid to check it was safe for human entry.
Explorer: This robot may have made a momentous discovery in a 2,000-year-old tunnel in Mexico
The was the first image transmitted by the robot deep under the ancient temple
For the rest of the story: http://www.dailymail.co.uk/news/article-2313312/Robot-discovers-unexplored-passages-2-000-year-old-tunnel-near-Pyramid-Sun-Mexico.html