Survival expert Ray Mears is holding out hope that a Brit journalist who went missing in the Amazon rainforest is still alive.
Dom Phillips and his Brazilian colleague Bruno Araujo Pereir, an Indigenous affairs official, vanished in the Javari Valley region more than three days ago.
The vast and "lawless" area is home to the world's largest number of uncontacted indigenous people, as well as narco gangs, illegal hunters and fishermen.
