Mesoamerica Deep in the jungles of Mesoamerica and South America arose some of the most mysterious civilizations of the past. They built magnificent cities, developed advanced mathematics, created precise calendars, and cultivated some of the most important crops ever raised. But they never used the wheel! And some of these civilizations had a dark side, too. Their magnificent temples once were scenes of human sacrifices to please their bloodthirsty warrior gods. People of the Pacific