The ancient city of Teotihuacan, located about 30 miles northeast of Mexico City, is one of the most intriguing places on Earth, as far as its history goes. Established circa 100 B.C.E., it was once one of the greatest cities in the world, with a population that reached around 125,000 people at its peak, and a landscape full of pyramids. In the 1970s and 1980s, a tunnel system was found beneath the Temple of Quetzalocaot — or the Temple of the Feathered Serpent, for the more exotic among you all — and while it was partially explored and mapped out in 2003, its most recent developments have been the most amazing yet.
And it’s all thanks to a Smallish Freakin’ Robot named Tialoc II-TC, named after Mexico’s god of rain. The three-foot-long, 77-pound Tialoc-II entered the tunnel last week, rolling through sludge and mud to reach the end of the tunnel, where archaeologists expected to find another chamber, similar to the ones at the mouth of the tunnel. Only the robot found three of them, thought to be burial chambers, as all these things generally are.