Two decades ago, Lake Turkana in Kenya’s northern arid regions was declared a World Heritage Site for its unique wildlife breeding habitats and astonishing fossil records. But today the lake and surrounding parks are under threat and have been placed on the World Heritage’s “In Danger” list. Sean Avery argues that both Ethiopia and Kenya are to blame – Ethiopia for developments on the Omo River, and Kenya for failing to manage the parks properly.

And in other stories, our experts investigate what happens to the human mind underground, why extinction processes have sped up, and how Islamic State has kept going despite all attempts to stop it.