While our home planet Earth is so far the only place known to have been inhabited by living things, it also has its extreme environments which resemble what it could have been like on other planets. On the boundary between Chile and Argentina is the world's highest active stratovolcano, Nevado Ojos del Salado.
Expedition to highest active volcano unearths clues about life on other worlds miragenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from miragenews.com Daily Mail and Mail on Sunday newspapers.