History Channel Documentaries - Secret Earth: Yellowstone Supervolcano

Seizoen: 2015 - Aflevering: 17 / 676 - Eerst uitgezonden: 21 december 2015 - Episode ID: 1271599

High-school science teacher Craig Beals digs into one of Americas biggest mysteries, the Yellowstone super volcano; Craig is on a mission to find out when it erupted last.