It’s always fun when scientists discover new stuff about really old cultures, especially when it has to do with getting weird and rocking out. Recent research suggests temples built around 600 A.D. in Palenque, Mexico were designed with projection rooms that shot the sound of voices and instruments 300 feet away with the help of stucco-coated surfaces. 1600 years before that , in the Peruvian Andes, a pre-Incan society in Chav