Chernobyl 40 years on, and countering ash dieback disease

Forty years on from the Chernobyl disaster, we discuss radioactive fallout and our relationship with nuclear risk. In sport, researchers suggest repeated head impacts may disrupt the blood-brain barrier, potentially increasing dementia risk in retired athletes. And a new approach offers hope for speeding up recovery from ash dieback in affected woodlands... Like this podcast? Please help us by supporting the Naked Scientists