What moment affected brad ferren so much that he realized art and technology coincide; and what, specifically, did he notice? how is the domed ceiling of the pantheon structurally possible? what did ferren's teachers tell him to focus on? why? what are polymaths? who did ferren name as polymaths that he admired? what are polymaths? who did ferren name as polymaths that he admired? what is a modern-day game changer like the pantheon, according to ferren? why would it be considered one? what invention does ferren say is not a modern-day pantheon? what does ferren believe is the next pantheon? describe something you know of, that combines art and technology, that could be considered a game changer.