And it had also been in place for a long time, similar in time frame to some of the great ancient civilizations that we see in Mesopotamia, the Indus Valley, and in China. For example, the oldest civilization we know of in Mesoamerica is the Olmec civilization, right over here. Here's a few of their artifacts they have. If we go into the Andes, near modern-day Peru, we have the Chavin culture, right over there. As you can see, a lot of these cultures, at least the ones that I'm putting here, and this is just a sample, I'm sampling some of North America, some around Mesoamerica, and some in the Andes. And then you can even go further back, and you can go to the Coral civilization. And what's really interesting about the Coral civilization is some archaeologists call this the first civilization.