| Udgivet: | 2017 |
|---|---|
| Episode: | Doomsday Volcano Mystery |
| Genre: | Dokumentar |
Scientist Rob Nelson investigates the world's strangest underground locations. He uses the latest technology and research to examine these mysteries. Idag: Under den tett befolkede byen Napoli skjuler det seg en stor trussel.
En supervulkan kan være like ved å få et katastrofalt utbrudd.
