Listener science questions from South Africa answered by Dr Chris this time include: Do you urinate more liquid than the alcohol you consume? Why do dark skinned people get pigmentation underneath their armpits and between their thighs? What are the latest developments in helping restore vision to blind people? Like this podcast? Please help us by supporting the Naked Scientists

Dr Chris answers listener questions. Including, is air made up of the same proportion of stuff everywhere on Earth? What is earwax? Where is it produced and for what reason? How does time work at the North Pole? Why do strong perfumes cause sinus congestion? Like this podcast? Please help us by supporting the Naked Scientists

Can you bring someone back from the dead? Can a special diet help flexibility in older people? What is the best way to get rid of hiccups? Are hovercrafts safe? Why is yawning contagious? Does hot water sound different to cold water? Are there tardigrades on the ISS? Dr Chris Smith and Zain Johnson have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

In a break from the usual format, the producers of The Naked Scientists take over from Clarence Ford to ask Dr Chris Smith some of your burning scientific questions. How does intuition work? Can you transplant a pancreas? Could we mine our second Moon? Why do lights flicker in our peripheral vision? Can one testicle still let you reproduce? Why do we dislike fairground rides as we age? Do we know what causes tinnitus? All will be revealed... Like this podcast? Please help us by supporting the Naked Scientists

Should you wash every day? Does washing your clothes damage them? Should you have a washcloth just for your face? Why does moving air make the temperature go down? Dr Chris Smith and Relebojile Mabotja have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

Why do some people struggle to read? Are more male babies born after a war? Are some people allergic to hot skin? Why do some men's breasts swell up? Why do we use different frequencies for different broadcasts? Why do traffic lights go red when you're in a hurry? Dr Chris Smith and Relebogile Mabotja have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

Why do some people grind their teeth? Can someone's heart keeping beating when they're dead? How does the brain interpret words? How do we know how long something has been dead for? Dr Chris Smith and Relebojile Mabotja have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

How much do wildfires contribute to carbon release? How do bones heal themselves? Why do weeds seem to grow faster than other plants? Why do some animals float, but others sink? Why do ducks like spinach? How did we evolve different blood types? Why do some people's temperature go down when they're feeling ill? How many of our metals come from space? Why do snails come out in the rain? Dr Chris Smith and Clarence Ford have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

What is monkeypox, and how can we tackle it? Why can't you walk through walls if atoms are mostly empty space? If X-Rays are harmful, why are microwaves and infrared not harmful? What are the benefits of the Large Hadrin Collider? Does taking Vitamin C harm your immune response? Dr Chris Smith and Clarence Ford have all the answers... Like this podcast? Please help us by supporting the Naked Scientists

Will we ever run out of helium? Will any planets in the solar system get knocked out of orbit? What causes ovulation pain? Is it wise to pop a zit? Why are two astronauts stuck in space? Have we re-invented lost inventions? Dr Chris Smith and Sara-Jayne Makwala King have all the answers... Like this podcast? Please help us by supporting the Naked Scientists