Inside Teotihuacan's Tunnel of Liquid Mercury

In 2003, a rainstorm opened a hole in front of a pyramid at Teotihuacan. Underneath was a tunnel sealed for 2,000 years, lined with pyrite spheres, mica and pools of liquid mercury. Archaeologists spent more than a decade mapping it with radar and a robot before anyone walked inside. This is what they found, what it may have meant, and what is still contested: the Teotihuacan tunnel, a city with no named king, and a fire that ended it all. 0:00 The Sinkhole 0:52 The City of Teotihuacan 2:21 No Iron, No Wheel 4:21 The Excavation 5:03 The Robot 6:02 Spheres and Mercury 6:53 The Mica Debate 8:42 A Journey Underground 9:08 Sacrifice Under the Temple 10:14 The Second Tunnel 12:11 Teotihuacan and the Maya 13:18 The Obsidian Economy 13:51 The Tlalocan Mural 14:40 The Fire 15:50 Still Unfinished Sources and footage: archaeological footage from INAH (Instituto Nacional de Antropología e Historia), used for commentary and education. Some scenes are AI-generated reconstructions. New real archaeology, no sensationalism, three times a week. Subscribe and hit the bell so you don't miss the next one. #Teotihuacan #Archaeology #AncientCivilizations #Mesoamerica