Modern Marvels: A look at the "science of safety" as applied to Indy or NASCAR racing. From tires to roll-cages to hood flaps, we examine the incredible technology that's helping prevent crashes and enabling drivers to survive the inevitable ones. See how today's innovative minds digitally reconstruct crashes and design new technology that keeps pushing the limits of racing. The drivers may grab the glory, but they wouldn't dare get behind the wheel if it weren't for the guys in white lab coats.