In Australia, where the mercury now sometimes nears 50 degrees Celsius - or 122 degrees Fahrenheit, people are grappling with a confronting question: what happens when their country becomes too hot to live in? Kicking off part one of our new three-part series Tales of the Environment, we hear how a doctor is looking to Indigenous knowledge, why heat is becoming a wealth issue, and the hopeful story of an endangered fish that walks along the ocean floor.