In a remote corner of far-western Brazil lies the Vale do Javari, home to one of the greatest concentrations of isolated or entirely “uncontacted” tribes in the Amazon. Unlike indigenous lands elsewhere in the country, which have been colonised and polluted, the Javari’s very inaccessibility has kept it largely untouched. But the people who live there remain extremely vulnerable. Recently, illegal gold miners in the region were accused of a brutal mass murder of ten members of an uncontacted tribe.