In tonight's Part Two of our series, we continue with the "Why?" of Tiwanaku and Pumapunku. As in, why was it all built? Why did Tiwanaku society spend so much effort and resources on it, and what did it mean to them? We then transition to the "How?" such a monumental architectural and cultural feat could be accomplished. What craftsmanship skills and construction technology did they possess to erect structures that continue to baffle present-day archaeologists and engineers? Could an organic technique of creating geopolymers, or essentially a type of concrete, explain the precise geometric shapes attained? Or was it a combination with a lost art of stone softening and shaping to achieve such exact tolerances? Perhaps they were just some of the best stonemasons in the world, with modern-quality chisels, drills, saws, and generations of labor at their disposal? And how did they come by their craft, through observation of nature and technical evolution, or some otherworldly source? We...