The 1,500-year-old Pumapunku temple in western Bolivia is considered a crowning achievement of Mesoamerican architecture, yet no one knows what the original structure actually looked like. Using historical data, 3D-printed pieces, and architectural software, archaeologist Alexei Vranich from UC Berkeley has created a virtual reconstruction of Pumapunku—an ancient Tiwanaku temple now in ruins. Archaeologists have studied the site for over 150 years, but it wasn’t immediately obvious how all the broken and scattered pieces belonged together. The surprisingly simple approach devised by Vranich is finally providing a glimpse into the structure’s original appearance. Excitingly, the same method could be used...