Welcome to the Collision Zone - the fiery unpredictability of Indonesia's volcanoes at one end, the massive Himalayas at the other and millions of years of tectonic tension in between. Subscribe to Spark for more amazing science, tech & engineering videos: 🚀 Join the Spark Channel Membership to get access to perks: You can now become a History Hit member right here on YouTube! Join for access to a new exclusive documentary every week, and access to over 160+ of our documentaries presented by world renowned historians like Dan Snow, Eleanor Janega, Tristan Hughes, Mary Beard, Matt Lewis and more. Get an exclusive release every week by signing up here: Any queries, please contact us at: owned-enquiries@ #Spark