
The Naked Scientists Podcast
1,254 episodes — Page 24 of 26

Ep 104Alzheimer's, the Brain and Memory
This week we learn about Alzheimer's disease, how it changes the brain and may be caused by the virus which causes cold sores. We probe your grey matter to find out how memory works, what goes wrong to give us false memories, and the science behind earworms - the songs that we can't get out of our heads! Also, GM plants that can survive a drought, why future chewing gum may contain magnolia bark and how a mirror can kill phantom limb pain. Plus, in Kitchen Science, we fool our senses with some plastic, some paper and a carpet! Like this podcast? Please help us by supporting the Naked Scientists

Ep 103Science in South Africa Special
This week, we bring you the highlights of the Naked Scientists trip to South Africa. We explore what life is like in the poor regions of Johannesburg, and how the frightening reality of HIV and AIDS offers a silver lining in prevention research. Plus, In a journey through our evolutionary history, we come face to face with the two-and-a-half million year old Taung child, one of the most important human ancestor fossils ever found. Also, we find out why a moon like ours is rare in the universe, how opals get their colours and how mice choose a mate by smelling their wee. And in kitchen... Like this podcast? Please help us by supporting the Naked Scientists

Ep 102The South Africa Space Special
This week on the Naked Scientists we cross hemispheres to explore galaxies far far away. Chris presents live from Johannesburg to discuss the South African Large Telescope whilst back in the studio we explore the effects of space travel on the body, the expansion of our universe and the possibilities of another planet earth. We also investigate effects on our hearing and bring you a special kitchen science that could be out of this world. Like this podcast? Please help us by supporting the Naked Scientists

Ep 101Naked Science Q & A Show
This week on the Naked Scientists we seek solutions to your science questions. From finding the site of the big bang to repairing the retina, mirages on the motorway to fruit fireworks in your microwave. We also find out why staying in bed could help you keep slim, we explore the genes that let flies get drunk, and discover the source of the so-called "Oh My God! Particles", which have 100 million times more energy than in our biggest particle accelerators. Also, we catch up with the latest in robotic cars and learn about the micro-microwave being used for analysis in the field. Plus, in a... Like this podcast? Please help us by supporting the Naked Scientists

Ep 100Human Origins and Migration
This week on the Naked Scientists, we're probing the origins of man and pursuing the spread of humans around the world. We find out how to date a hobbit, discover how an enormous flood formed the English Channel, and examine the evidence for when ancient humans first used fire. We also tune into the world's smallest nano-sized radio, talk to the two men who flew over Mt Everest on paragliders and in Kitchen Science, we show you how to re-light your fire! Like this podcast? Please help us by supporting the Naked Scientists

Ep 99Stem Cells and Cloning
This week on the Award Winning Naked Scientists we find out about stem cells and cloning. We discuss the elusive 'stemness' that allows cells to specialise, and learn about cloning in the post-Dolly the sheep era. We also find out how genetics has revealed that Neanderthals were redheads, how soap affects shoals of fish and some turtles come equipped with anti-roll bars. We also pay a visit to the Manchester Science Festival for a chat with Johnny Ball, and in Kitchen Science, we "clone at home" and find out the future of the humble banana. Like this podcast? Please help us by supporting the Naked Scientists

Ep 98Particle Physics Show
This week, we delve inside atoms to find out what matter is made of, and how smashing them together can tell us about the birth of the universe. We learn about quarks, antimatter and the 'god particle' and discover that scientists are actually trying to build a black hole in the lab! Also, nano-wires give us the world's smallest solar cells, we hear about glue from mussels that sticks to teflon and the genes that tell you when to wee. Plus Meera peers inside the Dead Sea scrolls without even having to unroll them, using x-rays called 'synchrotron light', and Ben and Dave show you how to... Like this podcast? Please help us by supporting the Naked Scientists

Ep 97Naked Science Q&A Show
This week, we're taking on your science questions. We find out how cockroaches and ants avoid the heat in a microwave oven, how best to protect yourself from lightning and why a light box can save you from a SAD winter. Also, a table decoration inspired, radiation-resistant spaceship design to keep astronauts healthy, how the contraceptive pill hurts A lapdancers' looks and why penguins prefer to go fishing with their pals. Plus, in Kitchen Science, Dave explains how to make a detector for the Earth's magnetic field - a home made compass! But will it work in space? And what will happen when... Like this podcast? Please help us by supporting the Naked Scientists

Ep 96Beer & Brewing
This week, we're quenching our thirst for knowledge with the science of Beer and Brewing! We learn about how beer is made, why nitrogen is vital for the perfect pint of Guinness and why professors of brewing think they have the best job in the world. We also delve into the natural history of beer, to discuss the age old argument, what came first, the beer or the bread? We look into the future of beer, finding out how the chemistry of carbon dioxide could provide a purer pint. Also, a spicy way to specifically kill pain, saving slight with plastic corneas, and the hot, smelly sex lives of... Like this podcast? Please help us by supporting the Naked Scientists

Ep 95Smart Materials
This week, we're exploring the science of Smart Materials - we discover a Super-Non-Stick coating that even honey wont stick to and flexible plastic paper with E-Ink that we-writes itself on demand. We learn how potatoes could form the basis of future plastics and a new way to think about 'bone china', as ceramics and polymers could replace your broken bones. Also, we discover where sea turtles spend their childhood, how a microRNA gene switch could put the brakes on the spread of cancer and how thousands of cases of breast cancer could be avoided without medication. Plus, in Kitchen... Like this podcast? Please help us by supporting the Naked Scientists

Ep 94Robots and Artificial Intelligence
This week, robots have taken over the Naked Scientists! Okay, not really but we are looking into the world of robotics to find robots that can clean your floor, disarm bombs and wage war on our behalf. We find out about 'Curious George', a robot that can locate objects in the real world even though it's only ever seen them online, and ask if artificial intelligence will give us free thinking machines or murderous intellects? We also find out about how robots have revolutionised the study of genetics, learn about a mini movie showing the formation of blood platelets in real time, and uncover... Like this podcast? Please help us by supporting the Naked Scientists

Ep 93The Best of the BA Festival
This week we're bringing you the very best bits from the BA Festival of Science in York. We discover a chewing gum that dissolves in the wash but still keeps your breath fresh, get some good news about cancer and find out why jogging may not be good for heart patient recovery if it's near a busy road. Also, Chris risks his health to find out about plague control in 17th Century York, and chocolate may be nicer than it is naughty, as Roger Corder explains how it could be good for your health. Out and about in the festival, Meera explores the psychology of commuter cooperation during the 2005... Like this podcast? Please help us by supporting the Naked Scientists

Ep 92Naked Science Q&A & the BA Festival
This week, we look at the latest science news and tackle more of your questions. We uncover the source of the asteroid that finished off the dinosaurs, find out how moray eels eat like aliens, and although we know that breast is best, could nicotine in smokers' breast milk be affecting childrens' behaviour? Also, is the future of formula one eco-friendly? Meera investigates race cars running on biofuels and built from hemp and cashew nuts! We discuss award winning beards, eerie glowing fish and what makes for a long life. Plus, we find out what to expect at this year's BA Festival of... Like this podcast? Please help us by supporting the Naked Scientists

Ep 91Naked Science Q&A
This week, Chris and Co are back from their holidays! So they're tackling their bulging mailbag of your questions. We discuss how scientists have been given the green light to cross human DNA with animal cells all in the name of medicine, eavesdroppers in your garden - the plants that respond to sound, and the world's smallest thermometer - only one molecule! We also tackle questions on keeping your beer cool on the beach, massive melons and the horticultural properties of wee. We find out about how radio shows can give Pygmies a voice and how anyone can have an out of body experience now... Like this podcast? Please help us by supporting the Naked Scientists

Ep 90The Best of the Naked Scientists 2
This week, we look back at more of the very best bits of Naked Science. We find out why scientists are swollen with success after discovering spider venom with Viagra-like properties, We meet a cow that produces skimmed milk straight from the udder, we remember a way to improve brain function and ask if a hot mint will still taste cold? Also - It's curtains for us! Joel Veitch explains why we should measure hazardicity in 'Curtains', we hear about some very clever birds who make plans for the future and we probe the hole in the ozone layer. Plus, we have two of the best kitchen science... Like this podcast? Please help us by supporting the Naked Scientists

Ep 89The Best of the Naked Scientists
This week, we look back at some of the juiciest bits of Naked Science from the last series. We find out how an iPod became an iRod to conduct lightning, discover an electrifying bikini and find out why teenagers feel so misunderstood, not that they're 'bovvered' about the answer. We discuss wine as an essential part of an healthy diet, find out about the people who feel no pain and explore why you can immediately tell an Aussie from an American or a Londoner from a Liverpudlian, just by learning about the way accents are formed. Plus, in Kitchen Science we find out how to turn an oven shelf... Like this podcast? Please help us by supporting the Naked Scientists

Ep 88Summer Special Q&A Show
This week, do diet foods make children fat? Could a space screw save us from catastrophe collisions? Have we seen the last of the Yangtze river dolphin? And should we look to the Simpsons for our science? Writer Al Jean explains that, despite the three eyed fish and three fingered hands, it's one of the most science literate shows on television. Also, as it's our Summer Special Question and Answer show we tackle your questions ranging from rising cakes to rising heart rates, why the moon looms larger on the horizon and why magnets make bad television. Plus, in kitchen science we investigate... Like this podcast? Please help us by supporting the Naked Scientists

Ep 87Venoms and Toxins - Natures Arsenal
This week, mind reading children, scientists find a new gene in the lung cancer cocktail, and satnav or map-nav - what's greener? Plus we become biological weapons inspectors and explore nature's arsenal of venoms, poisons and toxins, including a scorpion's sting that can highlight cancer, how funnel web spiders are helping farmers fight off insect pests, the marine cone snail that harbours a painkiller ten thousand times more powerful than morphine, and how a snake bite can help to prevent a heart attack. Meanwhile, in Kitchen Science, Ben samples a more everyday toxin - by making stinging... Like this podcast? Please help us by supporting the Naked Scientists

Ep 86Naked Science Q&A Show
This week, clean coal technology - how to get the energy from coal without digging it up, why GM goats are helping to combat nerve gas attacks, and how scientists have found the 'itch' gene. We also find out why smog causes heart disease, how seafood in space can help to heal astronauts, and the weight of leaves on an average tree. Plus Drs Chris and Phil take a look at your science questions including 'tasting' music, the best way to dry your washing and can the moon affect the shapes of weather systems? In Kitchen Science Ben and Dave explain how to make a lens with a plastic bottle and some... Like this podcast? Please help us by supporting the Naked Scientists

Ep 85Extreme Survival Show
This week, we find out about survival in extreme environments. We find out how free divers descend hundreds of feet underwater without air, how life thrives beneath the ice in Antarctica, how fighter pilots combat G-forces to avoid blackouts, and how the body copes with exercising at the top of Everest. Also, discover the benefit of breaks between bouts of exercise, how geckos hold the key to underwater post-it notes, and a gene that lets you chat whilst listening to the radio. Like this podcast? Please help us by supporting the Naked Scientists

Ep 84Fuels of the Future
This week, from iPod to iRod as a man's taste for music turns him into a human lightning conductor, why penguins are picky eaters, and better biopsies - why doctors are attracted to a new magnetic cancer detection system. Also a fuel made from fructose that packs a punch like petrol, we find out how to make hydrogen on demand using aluminium, and grow your own gas - do we have enough land to grow our energy in future? Plus, in Kitchen Science, we turn vegetable oil into biodiesel and ask a white van man to test it... Like this podcast? Please help us by supporting the Naked Scientists

Ep 83The Brain, Epilepsy and Out of Body Experiences
This week news that men talk as much as women, cosmetics from jellyfish, songbirds "greatest-tits", a breathtaking asthma breakthrough and a gene-screen for bowel cancer. We also uncover the cause of contagious yawns, probe the brain basis of epilepsy and manic depression, and uncover a brain region responsible for out of body experiences. Plus, in Kitchen Science, Ben and Dave find out why the raisins always rise to the top of the cereal box. Like this podcast? Please help us by supporting the Naked Scientists

Ep 82Question and Answer Show
This week, playing bingo on an inflatable space station, a new way to attack the cause of Alzheimer's and mending a broken heart with stem cells. Also, using bananas to speed up fruit ripening, leeches out of water and chemical tricks to stop smoking and iron out wrinkles. Plus, in Kitchen Science we vibrate our way to a fountain in a cup! Like this podcast? Please help us by supporting the Naked Scientists

Ep 81ARMAGEDDON - Super Volcanoes, Meteorites and Earthquakes
This week a rabies-based Trojan Horse that smuggles drugs across the blood-brain barrier, why first-borns are brighter, progress with Parkinson's and a lunar telescope more powerful than Hubble. Plus in this week's ARMAGEDDON-focused show we look at supervolcanes, earthquakes and arsenic, find out why curtains are absolutely lethal and why a meteorite impact probably didn't dispense with the dinosaurs after all. Also, in Kitchen Science, we test the claim that tapping the top of a fizzy drink before you open it stops it spraying all over you... Like this podcast? Please help us by supporting the Naked Scientists

Ep 80Forensic Science Show
Under the microscope this week, the science of forensics. We find out how scientists have exploded the myth about old aged whales thanks to a piece of shrapnel, about a new rice-based vaccine for cholera, and 'whey' to go, how scientists have made edible food wrappers from milk. We investigate what your diet does to your hair, how science can finger forgers and flush out bodies from bogs, and why the key to identifying a torso that washed up in the Thames was rooted in plant science. Plus, in Kitchen Science, we arm Ben with a rifle to find out how fat you'd have to be to stop a speeding... Like this podcast? Please help us by supporting the Naked Scientists

Ep 79Question and Answer Show
This week, why some people have green blood, how radiation-hungry fungi will feed astronauts of the future, and how a cider a day keeps the doctor at bay. We discuss corrupt chemists, what happens when galaxies collide, how Beaujolais benefits your breath and if a person can feel the cold in space. Plus, in Kitchen Science we iron out the crumbs in your cornflakes! Like this podcast? Please help us by supporting the Naked Scientists

Ep 78Animal Behaviour - Feathered Einsteins, Mischievious Meerkats and Monkey Vision
This week, will a hot mint still taste cold? Also how skimmed milk could come straight from the cow in future, and why we walk upright without dragging our knuckles. Nicky Clayton discusses clever birds that use cigarettes to fumigate their feathers, Tim Clutton-Brock describes the family affairs of meerkats, and we find out from Andrew Smith why monkeys see what we see, but cats and cows can't. Plus, in Kitchen Science, we get jiggly with a jam jar full of rice. Like this podcast? Please help us by supporting the Naked Scientists

Ep 77Planets and Cosmology
This week, Drs Chris and Helen find out how your fingers can reveal whether you're mathematically minded, and bridge-building ants that quite literally let themselves be walked over. Also, Astronomer Carolin Crawford takes us on a foray into outer space to discover the shape of the universe, we meet a geyser so tall that it spurts into space, and we Join Maggie Turnbull as she searches for nearby planets that could sustain life. Plus, in Kitchen Science, how to measure the speed of light using a microwave oven! Like this podcast? Please help us by supporting the Naked Scientists

Ep 76Volcanic pollution, the Ozone Hole and the Greenhouse Effect - The Atmosphere Show
This week, scientists recreate hair follicles, we uncover a means of making hydrogen in a hurry, hear about a stealthy way to destroy cancer and find out why a dose of herpes could be good for you. Also, John Grattan describes the biggest atmospheric pollution event in history, we discover with Rod Jones the role of water in the greenhouse effect, and Jonathan Shanklin tell us the 'hole' story of the ozone layer. Plus, in Kitchen Science, we make a cloud in a bottle! Like this podcast? Please help us by supporting the Naked Scientists

Ep 75Germs, Fungi and Viruses - The Microscopic World
This week, Dr Chris and Dr Helen explore the microscopic world, finding out why diarrhoea and projectile vomiting make cruise ships the perfect culture vessel for noroviruses, and asking why fungi are so important for great tasting chocolate. Also, we look at giving yeast a sense of smell, predict the weather for a planet 63 light years away, and size up the world's smallest scales, which are capable of weighing a single bacterium. Meanwhile, in Kitchen Science, we looked at toilet seats and kitchen surfaces to see which harboured the most bacteria, and came in for a nasty surprise! Like this podcast? Please help us by supporting the Naked Scientists

Ep 74Naked Scientists Question and Answer Show
This week Drs Chris, Dave and Phil find out how a venomous spider has got scientists swollen with excitement because it's bite has Viagra-like properties, how maggots are fighting off MRSA from ulcers, and NASA are testing their next generation telescope aboard a jumbo jet. The docs also explore the science of getting geostationary satellites into space, the basis of bacterial intelligence, and how much water trees drink on a hot day. Plus, in kitchen science, Dave and Ben put their heads in a box...to find out how a pinhole camera works. Like this podcast? Please help us by supporting the Naked Scientists

Ep 73Migrating Genes, Surnames and Y Chromosomes
This week we're exploring how populations come by their genes including the surprise finding of African DNA in a remote village in Yorkshire. Oxford University's Bruce Winney explains how studying rural populations in Britain is helping to uncover genes linked to different diseases, and Turi King, from Leicester University, discusses what your Y chromosome says about your surname. Plus we'll be hearing how Cambridge scientist Mike Majerus is putting evolution to the test with the help of the peppered moth, and in kitchen science, more jam tomorrow as Ben and Dave show you a trick with a... Like this podcast? Please help us by supporting the Naked Scientists

Ep 72Oceans and Marine Conservation
This week on the Naked Scientists an invitation to come and dive beneath the surface of the sea, to find out what is happening in the world's oceans. Your guides will be Marine Biologist Dr Annelise Hagan (University of Cambridge) and Ecology and Evolutionary Biologist Dr Stan Harpole (University of California, Irvine). Annelise will be talking about her project which monitors coral reefs and will explain why and how she does this, Stan will discuss his recent Nature paper on species loss resulting from reduced niche dimension and how nutrient pollution is responsible. Like this podcast? Please help us by supporting the Naked Scientists

Ep 71New Ideas in Cancer
This week we look at new developments in the science of cancer with Fiona Watt and Andy Futreal, we will see how new gene technologies could be key to understanding cancer, and knowing the role of stem cells could be essential to find effective cures. Meanwhile, Dave tells you how to make your own electric slime. Like this podcast? Please help us by supporting the Naked Scientists

Ep 70Heart Disease and Repairing the Damaged Heart
This week we explore the science of Heart Disease. Dr Niall Campbell joins us to explain what heart attacks are and how theyre treated, Dr Anthony Mathur discusses how stem cells might hold the key to mending a broken heart, and Ben Valsler visits Brian Callingham to investigate how arteries behave when you give them various drugs. Like this podcast? Please help us by supporting the Naked Scientists

Ep 69The Science of Flight
This week we explore the science of flight. Dr Graham Taylor from Oxford University talks about the aerodynamics of insect flight and how video camera back-packs allow him to see how eagles fly, and Jenny Goodman describes how future aircraft might be flying at six times the speed of sound while withstanding temperatures hot enough to melt stainless steel in 5 seconds! In Kitchen Science, Ben Valsler sticks with the flight theme and finds out how a hot air balloon works. Like this podcast? Please help us by supporting the Naked Scientists

Ep 68National Science and Engineering Week
Every year the Cambridge Science Festival celebrates some of the best and most exciting science and engineering going on in the UK - and the Naked Scientists were there! Find out about the cool science of ice cream, the microscopic world of microbes, and the IgNobel awards for science at its most silly. Looking further afield, the University of Aucklands Peter Metcalf unlocks the secrets of a viral sarcophagus, and Mike Brown from the California Institute of Technology discusses the origin of some mysterious objects in the Kuiper Belt. To cool us down after all that excitement, Dave and Azi... Like this podcast? Please help us by supporting the Naked Scientists

Ep 67Naked Science Question and Answer
Contaminated petrol, astronauts in danger of lung diseases, a new way to put the brakes on car accident rates, gas sensors made from silicon replicas of marine algae and how pollution is causing droughts, plus a healthy digest of your science questions and emails top the bill in this weeks Naked Scientists. Like this podcast? Please help us by supporting the Naked Scientists

Ep 66Peruvian Mummies and Animal Domestication
This week we unwrap the secrets of ancient mummies from Peru with the help of London Universitys Lawrence Owens, find out where domestic animals and pets came from with Keith Dobney from the University of Durham, and in kitchen science Dave explores the science of fires and fuels by blowing up some custard. Like this podcast? Please help us by supporting the Naked Scientists

Ep 65Parasites and Clean Water Supplies
Clean water is something that many of us take for granted, but Mark Booth describes how in many parts of the world dirty water can lead to life-threatening disease and parasitic infections. To talk about the current strategies in place to supply clean water we are joined by the World Heath Organisations Alex McKie, and Colin Humphreys explains how high-energy UV LEDs could help provide clean water in the future. In Kitchen Science, Helen Scales and Dave Ansell bring sweetness and light to a house in Cottenham... Like this podcast? Please help us by supporting the Naked Scientists

Ep 64Naked Question and Answer and Venomous Vipers
Dr Chris and Dr Helen answer all your burning science questions, including why frost can form even when the air temperature is above zero, why hair looks darker when it is wet, why sunlight looks red through your eyelids, and whether cracking your knuckles really causes arthritis. We also talk to Chemistry World editor Mark Peplow about venomous vipers, artificial kidneys, and how LSD might be switching on hallucinations, and in Kitchen Science Anna Lacey and Dave Ansell look at some slightly safer visual effects with the help of a sodium street light. Like this podcast? Please help us by supporting the Naked Scientists

Ep 63Nuclear Power and Radiation in Medicine
Nuclear energy is always in the news, but how much do you know about nuclear fission and what happens to nuclear waste? To find out how it works, Anna Lacey and Dave Ansell visit Sizewell B power station in Suffolk, and studio guest Ian Farnan discusses nuclear waste disposal and why current methods might not contain the radiation for as long as we thought. But as clinical radiologist Anant Krishnan explains, radiation plays a crucial role in medicine, including allowing us to see broken bones and killing off tumours. Sticking with uses of radiation that save lives, Anna and Dave find out how... Like this podcast? Please help us by supporting the Naked Scientists

Ep 62Science of Pain and Phantom Limbs
The science of pain is our hot topic this week. David Julius reveals the molecular mechanisms of pain and what a chilli pepper has in common with a tarantula, Geoff Woods describes the genetic mutations that lead to people not feeling pain at all, and to explain the phenomenon of phantom limbs and ways in which we can deal with pain is pain consultant Cathy Stannard. In Kitchen Science Derek Thorne braves freezing weather to sniff out the science of sausages, and in the final part of our Science of Colour series, Anna Lacey discovers how colour could find you your perfect date. Like this podcast? Please help us by supporting the Naked Scientists

Ep 61Extreme Organisms and Hydrothermal Vents
This week we take a look at extreme environments and the organisms that live in them. Crispin Little talks about hydrothermal vents and the fastest fossilisation on the planet, Steve Scott explains why mining companies are interested in hydrothermal vents, and Lisa Pratt describes how bacteria find energy three kilometres beneath the surface of the earth and how similar strategies could be used by life on other planets. From the extremes of the Earth to the extremes of the kitchen, Derek Thorne and Hugh Hunt find out whats hot and whats not in the dishwasher... Like this podcast? Please help us by supporting the Naked Scientists

Ep 60Climate Change and Renewable Energy
Following this weeks crazy weather we have a look at Climate Change with Eric Wolff from theBritish Antarctic Survey, who will be talking about secrets about the climate locked away in ancient ice,Jon Gibbins from Imperial College tells us about ways we can store all that excess carbon dioxideunderground, Ali talks to Alison Hill from the British Wind Energy Association and Max Carcas from OceanPower Delivery about wind energy and wave energy, and Derek Thorne, Dave Ansell and Ali Webb try to discoverhow much power we could generate by hooking the countrys gyms to the electricity grid. Like this podcast? Please help us by supporting the Naked Scientists

Ep 59Naked Science Question and Answer and the World of Chemistry
With a new year comes a whole new stack of science questions to challenge Dr Chris, Dr Dave and Dr Kat. This week they explain where the sand in the Sahara comes from, whether mirrors can reflect x-rays, if it is dangerous to live near a phone mast, and whether splitting water could solve our energy problems. We are also joined by the editor of Chemistry World, Dr Mark Peplow, who talks about labs the size of a postage stamp, nanoparticles in exhaust fumes, and why putting milk in your tea might not be such a good idea, and sticking with chemistry, Dave Ansell discovers which household liquids... Like this podcast? Please help us by supporting the Naked Scientists

Ep 58Red Wine, Caffeine and Bugs in Your Guts
In the first show of 2007, Drs Chris, Dave and Helen find out why red wine is better for you than white wine or grape juice, and explore the science of healthy living with with London University researcher and author Roger Corder. We also discover the science behind another of the nations favourite drugs, caffeine, with the help of Bristol Universitys Peter Rogers, and University of St Louis researcher Jeffrey Gordon explains how the bugs living in your intestines help you to make the most out of mealtimes. They might also, he thinks, make some people fat. Plus, in kitchen science, Dave... Like this podcast? Please help us by supporting the Naked Scientists

Ep 57Christmas Question and Answer and the Star of Bethlehem
In the final show of 2006, Chris, Dave and Kat answer all your science questions including why poppadoms curl upwards in the pan, how seedless grapes grow, and if lightning really does strike twice. To celebrate the coming of Christmas, Colin Humphries joins us to explain the astronomical phenomenon behind the Star of Bethlehem, and in Kitchen Science Derek Thorne and Alicia Webb knock back a few shots of vodka to find out how breathalysers catch drink-drivers. In the second part of the Science of Colour series, Anna Lacey finds out about the history of mauve and how hair dye conceals those... Like this podcast? Please help us by supporting the Naked Scientists

Ep 56Dark Matter, Northern Lights and Mars in 3D
Shedding light on the deepest depths of the universe is Gerry Gilmore, who talks about the Big Bang and the mystery of dark matter. We also hear from Peter Muller and Giulio del Zanna about 3-D imaging of the surface of Mars and how solar flares contribute to everything from the Northern Lights to damaging communication systems. David Block describes how Andromeda, the galaxy closest to the Milky Way, was recently involved in a galactic collision, and in case you fancy seeing some collisions here on Earth, Derek and Dave are in the kitchen making meteorite craters. Like this podcast? Please help us by supporting the Naked Scientists

Ep 55Naked Science Question and Answer and Polonium Poisoning
Dr Chris, Dr Dave and Dr Phil answer all your questions on science, technology and medicine, including why spiders do not run out of silk, what the universe is expanding into, what a flame looks like in space, and what happens when the brain is cut off from a supply of oxygen. We also talk to Dr Mark Peplow about polonium 210, how much was needed to kill former Russian spy Alexander Litvinenko, and where the perpetrators could have acquired it. Sticking with nasty substances, Derk and Dave make a mess with milk and vinegar in Kitchen Science. Like this podcast? Please help us by supporting the Naked Scientists