The search for precious metals led the Spanish to find and eventually destroy two of the world's great empires, the Aztecs and the Inca. And many thousands were killed mining silver and the mercury used to refine it. But before you say it wasn't worth it, remember that this process led to the life that you have today, one where I can teach you history through the magic of the internet. Worth the sacrifices, human and otherwise? I don't know, you tell me. Thanks for watching. See you next week.