For peat's sake: Amy and Maya investigate why bogs help keep organic material from decaying and view the preserved humans in The Mysterious Bog People, a traveling exhibit at Carnegie Museum of Natural History. Tyler and Aditya design their own rollercoaster and test it on a simulator at the Carnegie Science Center, finishing their investigation on "Phantom's Revenge," a roller coaster at a nearby amusement park. And at the Pittsburgh Convention Center, Dragonfly TV reveals a Science Secret that makes other cities green with envy.