This time on Question of the Week, James Tytko is being given a mental work-out thanks to this listener question on muscle fatigue. We learn about the biological reactions which govern intense exercise from Andy Jones, Professor of Applied Physiology at the University of Exeter... Like this podcast? Please help us by supporting the Naked Scientists

In the news podcast, a new retinal implant - just two millimetres wide - that is helping restore sight to blind people; a 'pristine' star that gives us a glimpse of the workings of the early Universe; and we'll be finding out how wild rooks can master human commands. Like this podcast? Please help us by supporting the Naked Scientists

As the Royal Botanic Gardens, Kew celebrate the 25th Birthday of the Millenium Seed Bank in Sussex, James Tytko ventures into its giant underground vaults to learn why they are a crucial part of global plant conservation... Like this podcast? Please help us by supporting the Naked Scientists

Why does La Nina cause more rainfall in South Africa? How can we keep our skin moist without buying products? Is it possible to be averse to iron in your diet? What causes hot flushes during the menopause? What could cause a potential iron taste in my mouth? Like this podcast? Please help us by supporting the Naked Scientists

Listener Krzysztof has written in to ask how skin is protected from potentially harmful UV radiation by sun cream products. To help him with the answer, James Tytko put in a call to Antony Young, Emeritus Professor of Experimental Photobiology at King's College London... Like this podcast? Please help us by supporting the Naked Scientists

In this edition of The Naked Scientists: Whether talc-based products - like baby powder - can cause ovarian cancer. Also ahead, the "Sword Dragon of Dorset" found on England's Jurassic Coast. Plus, we'll be finding out about the 'double comet' visible in the night sky... Like this podcast? Please help us by supporting the Naked Scientists

In this edition of The Naked Scientists, why we lose our hearing and what we can do about it... Like this podcast? Please help us by supporting the Naked Scientists

Ian from Stockport has had a thought. If heat pumps transfer thermal energy from outside into our homes, will they counteract the relative heat of urban areas compared to the countryside? To get to the bottom of this energy enquiry, James Tytko asked for the expertise of Professor Bob Critoph, from the University of Warwick's School of Engineering. Like this podcast? Please help us by supporting the Naked Scientists

It's another jam-packed episode of Ask the Naked Scientist, illuminating listener questions - in all their usual, rich variety - with fascinating scientific explanations. What do we know about the latest interstellar objects to pass through our Solar System? Is having a great memory all upside? Why does eating pineapple hurt the inside of your mouth? Do waves really come in sets of seven? Does silver have antibiotic properties? Is there a limit to the number of pop songs that can be written? Like this podcast? Please help us by supporting the Naked Scientists

In this edition of The Naked Scientists: Is elite level sport linked with Motor Neurone Disease? We examine the evidence as another top player announces his diagnosis. Also, cages that can sieve out molecules, the immune system peacekeepers; and the quantum realm: we look at this year's Nobel Prizes for science. And, how did birds react to the Great American Eclipse last year? Like this podcast? Please help us by supporting the Naked Scientists