Use BBC.com or the new BBC App to listen to BBC podcasts, Radio 4 and the World Service outside the UK.
From Hay Festival 2026, a dive into a big year for our oceans, with plankton specialist Vincent Doumeizel and physicist turned oceanographer Helen Czerski. Vincent is author of the Power of Plankton, which describes the crucial history and future of plankton and planktonic life on our planet. Helen's book The Blue Machine looks at the physical oceanic processes that shape the world. Presented by Tom Whipple Produced by Alex Mansfield
