Marnie Chesterton hears of a simple test for the earliest signs of Alzheimer's disease. She finds out about UK scientists using robots to map radiation at Chernobyl, and talks to Merlin Sheldrake about fungi.

Roland Pease travels to Bath University to meet scientists who may have developed a way to diagnose Alzheimer's in the earliest stages of the disease. Dr George Stothart, has led the team in the development of this simple 2 minute test.

Prof Thomas Scott of Bristol University and team develop robotic techniques to scan areas of high radiation that would otherwise be unsafe for humans to enter. Their rolling, quadruped or even flying robots have recently been deployed in and around the reactor building at the Chernobyl disaster site. Authorities there have recently been licensed to begin disassembling remains inside the vast concrete shield, but as they do so, areas of intense radiation are likely to shift from day to day. Being able to map these changes in 3D at the end of each working shift should enable workers to avoid the areas of biggest danger.

Dr Merlin Sheldrake is one of the nominees for this years Royal Society Insight Investment Book Prize. "Entangled Life - How Fungi Make Our Worlds, Change Our Minds, & Shape Our Futures" is a rich tale of interconnectedness and subtle intrusion and extrusion between different living things, and particularly fungi's huge influence on human existence, from beer, bread and psychedelia to the whole history of life on earth.

Presented by Marnie Chesterton

Made in Association with The Open University