The Incan Empire ruled 12 million people but was conquered by 260 Spanish invaders - and a few germs. Find out about chilling child sacrifices, Incan golden temples, and why Llamas wore earrings and drank beer.The Incan Empire ruled 12 million people but was conquered by 260 Spanish invaders - and a few germs. Find out about chilling child sacrifices, Incan golden temples, and why Llamas wore earrings and drank beer.