and they were trading with teotihuacan. so, it was this very, very huge metropolis. it had a lot of extensive network. and their main, main trade item was obsidian. mesoamericans, people from the americas, did not have metal. but instead of metal, they worked with obsidian, which is a volcanic rock, and they could make any sorts of tools with it. so, that was part of their major source of economic trade. but they also had extensive trade with regions from oaxaca, people from zapotec regions, people from veracruz, and the mayans. and they were trading seashells, they were trading jade, feathers, cacao. so, this is more--teotihuacan was more of this big metropolis where people were also coming in for the religious aspect of it 'cause the pyramids in teotihuacan were temples of worship. damian: and how much did astronomy play in designing teotihuacan? i mean, you're not a historian, but you know a lot about it, a lot more than i do. but i'm sure astronomy played a lot in it. raquel: yeah, and that's a great question. and there

describe what you're doing to take us to teotihuacan