What in the World

• Fluoride: What you need to know

  Fluoride has been in most American tap water for decades. It’s there to help to prevent tooth decay, especially in children. Scientists and health officials say it’s one of the biggest public health wins of the 20th century. But lately, fluoride has found itself at the centre of a heated debate, with some people concerned about side effects. Robert F Kennedy Jr, the US Health Secretary, is one of those, but he has long expressed views that conflict with scientific evidence.We break down the facts about fluoride, explain how the quantities of it in water is safe and tell you what you need to know with Phoebe Hopson, a BBC reporter, and Michelle Roberts, a doctor and health reporter.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy and Emily Horler Editor: Verity Wilde

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• Deepfake porn crisis: How it’s affecting schools in South Korea

  Over 500 schools and universities in South Korea are dealing with a deepfake porn crisis. Explicit images and videos of classmates and teachers are being shared. The perpetrators are often students themselves. In fact, 80 per cent of those arrested for creating and distributing deepfakes are teenagers.Hyojung Kim from the BBC’s Korean Service explains what’s happening and what’s being done to stop it.Plus, presenter and campaigner Jess Davies gives us tips on what to do if you have been deepfaked.If you’ve been affected by any of the issues raised in this episode and you are based in the UK, you can get support from relevant organisations through the BBC Action Line website: https://www.bbc.co.uk/programmes/articles/22VVM5LPrf3pjYdKqctmMXn/information-and-support-sexual-abuse-and-violence.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: William Lee Adams Producers: Julia Ross-Roy, Elena Angelides, Benita Barden and Adam Chowdhury Editor: Verity Wilde

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• How do you become the happiest country in the world?

  The annual World Happiness Report is out and Finland has been named the happiest country for the eighth year in a row. What makes the Finns so joyful? Emilia Jansson from the What in the World team breaks it down for you. But, is happiness just a fleeting emotion or is there more to it? Sarah Jelbert, a lecturer who teaches courses on the science of happiness explains how you can improve your life satisfaction. And we hear from Sweden and Costa Rica, two countries that rank in the top ten. Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Emily Horler and Maria Clara Montoya Editor: Julia Ross-Roy

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• How can you spot a TikTok wellness scam?

  Netflix has a TV show out called Apple Cider Vinegar - it’s a dramatisation of a real story of a real influencer who was popular online, and said she was treating a terminal illness with alternative therapies. But it turned out the supposed natural treatments she was promoting didn’t do anything, because she didn’t really have brain cancer. So it got us thinking - how can you spot false wellness claims?Drinking special tea to make you slimmer. Rubbing bee venom on your face to reduce fine lines and wrinkles. Inserting gemstones into your vagina to regulate menstrual cycles. These are just three on the seemingly endless list which have little to no scientific evidence to support their purported benefits. Jacqui Wakefield, a reporter with the BBC’s Global Disinformation Unit, takes us through what makes these trends take off and how we can spot the bad ones online. Makuochi Okafor in our Lagos bureau explains what wellness scams look like in Nigeria. And Maria Clara Montoya tells us about the scene in Latin America.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: William Lee Adams Producer: Emily Horler Video Journalists: Benita Barden and Adam Chowdhury Editor: Verity Wilde

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• Why were NASA astronauts ‘stuck’ in space?

  Imagine going on a work or school trip for eight days, but ending up away from home for nine months. Now, imagine that journey was to space. NASA astronauts Suni Williams and Butch Wilmore’s spacecraft launched in June last year from Cape Canaveral in Florida. They were taking part in the first crewed test flight of the Starliner spacecraft, developed by Boeing. But there were some technical problems after launch and NASA decided it was too risky to use it to take the astronauts back to Earth. Instead, Suni and Butch would catch the next scheduled flight home, which ended up being nine months later. And now Suni and Butch have splashed down off the coast of Florida in a different spacecraft. Our Science Editor, Rebecca Morelle, explains what went wrong with the mission, if they were really stranded, and what daily life is actually like in space.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Emily Horler and Elena Angelides Editor: Verity Wilde

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