John writes in wondering whether the 10,000 steps rule applies eqully to everyone, given the range of body types and fitness among the population. James Tytko wondered where the 10,000 number came from in the first place, and sought an answer to John's question with the help of Dr Raj Amarnani, Consultant in Sport, Exercise and Muscoskeletel Medicine... Like this podcast? Please help us by supporting the Naked Scientists

In this edition of The Naked Scientists: How the latest science helped the Caribbean prepare for Hurricane Melissa. Also ahead, the alcohol-free beers providing a 'buzz' without the hangover. And, why a German warehouse is simulating a European Moon landing... Like this podcast? Please help us by supporting the Naked Scientists

Today, in association with Proteomics International, we're hearing about a new era in medicine where we can tell people not what diseases they've got, but what ones they will have in ten years' time, giving them a chance to turn things around... Like this podcast? Please help us by supporting the Naked Scientists

What happens to helium balloons that float away? Are satellites safe from terrorist attacks? Why does the truth hurt? Why does some poo float after flushing? Are there any treatments for tinnitus? Do headphones contribute to tinnitus? What are restless legs? What is the best way to regulate cortisol levels? Why does the body wake us up to wee? Dr Chris Smith and Clarence Ford have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

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