Do you find yourself tossing and turning for hours whilst struggling to fall asleep? Or are you out like a light the minute your head touches the pillow? Genetics and environment can play a big part in how easy (or not) you find sleeping.

BBC science journalist Caroline Steel tells us more about what happens to our brains when we sleep and what exactly happened when she visited a sleep lab for a BBC documentary. Medical doctor and sleep expert Dr Jonathan Tham gives us his top tips on getting a good night’s sleep.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: Emilia Jansson, Josh Jenkins and Julia Ross-Roy Video Journalist: Jem Westgate Editor: Verity Wilde

Oceans make up more than 99% of the Earth’s habitats by volume — yet less than 20% of them have been explored. Some even say it’s easier to send astronauts into space than it is to reach the ocean floor. Only a handful of people have ever reached the deepest part of the ocean - known as the Challenger Deep in the Mariana Trench in the Pacific Ocean. So, why is it so difficult to get there? And what new tech is helping us uncover the ocean’s secrets?

The BBC’s Climate and Science correspondent Georgina Rannard explains why we know so little about what’s going on in the deepest parts of the ocean and some of the discoveries that have been made about this mysterious part of our world.

Archive courtesy of British Pathé.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producers: Baldeep Chahal, Julia Ross-Roy, Emily Horler and Emilia Jansson Video Journalist: Baldeep Chahal Editor: Verity Wilde

Across cultures, weddings are usually a big event. Lots of us look forward to dressing up and dancing the night away with the person we love — but what if you kept all the festivities and got rid of the romance? Well, some young people in China are doing exactly that, by looking online for a ‘marriage buddy’. They pretend to be together to please their families, but aren’t actually legally married. So, why are they willing to go to such lengths to meet societal expectations? And how does it all work?

Wanqing Zhang from the BBC’s Global China Unit talks us through the process — and explains the pressure put on young people in China to tie the knot. And we hear from Linda, a young woman in China who tells us why she’s decided to find a marriage buddy.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: Chelsea Coates, Mora Morrison and Maria-Clara Montoya Video Journalist: Baldeep Chahal and Jem Westgate Editor: Julia Ross-Roy

Loneliness is a feeling lots of us face from time to time… and it might be more common than you think. A new study from the World Health Organisation suggests that between 2014 and 2023, one in six of us were feeling lonely - and teenage girls reported feeling this way the most. Apps like Bumble BFF or Meetup and social media groups dedicated to meeting new people are also on the rise. So why are so many of us feeling lonely? And what can you do to feel more connected?

BBC journalist Emilia Jansson takes us on a friendship date, sharing her experience of using social media to make new friends and helping us to unpack the data on loneliness. We also hear from teenagers around the world who describe when they’ve felt lonely. And Dr Laurie Santos, a psychologist professor at Yale University in the US, tells us her top tips for tackling loneliness.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: Mora Morrison and Chelsea Coates Editor: Emily Horler

Tension is rising in Kenya after a new wave of anti-government protests against alleged government corruption and police brutality.

Dozens have been killed and many have condemned the words of President William Ruto, who’s said that protesters targeting businesses should be shot in the legs.

Anita Nkonge, a BBC reporter in Nairobi, explains what has been happening; plus we hear from young Kenyans who have attended the protests.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: Emilia Jansson, Josh Jenkins, Emily Horler and Maria Clara Montoya Editor: Julia Ross-Roy

Water pistols have become a symbol of resistance against overtourism in several cities around the world. This summer local residents in Barcelona, Spain, have been using them again to show their frustration at how mass tourism is impacting their city; from housing to overcrowding.

BBC journalist Laura García joins us to explain why there is so much anger directed towards tourists, as well as host websites such as Airbnb. We also hear which strategies governments in Spain and elsewhere are adopting to deal with the issue. Plus, travel influencer Joy Malonza shares tips about how we can all be more conscientious travellers.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Emilia Jansson and Mora Morrison Video Journalist: Baldeep Chahal Editor: Julia Ross-Roy

Rare earth minerals are vital to modern human life - but you probably haven’t heard of them. They’re in our phones, computers and cars. These minerals aren’t actually that rare, but they’re difficult to extract - and this process can be pretty damaging to the environment. Mining just one tonne of rare earth minerals creates 2,000 tonnes of toxic waste. China has been mining rare earths since the 1950s and now the rest of the world is scrambling to find their own reserves.

The BBC’s Climate and Science reporter Esme Stallard explains what rare earths are, and why they matter. And BBC China correspondent Laura Bicker has been to visit two of the most important rare earth mining sites in the country. She tells us about the visit and the pollution their extraction has caused.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producer: Josh Jenkins and Emilia Jansson Editor: Julia Ross-Roy

From drafting emails to planning trips, AI has become like a personal assistant for lots of people around the world. Now, the technology is playing a new role: therapist. Rather than waiting for an appointment or paying to see a professional, thousands of people are turning to AI bots like ChatGPT or DeepSeek for emotional support and advice on their mental health. But is AI up to the job - or could it risk making things worse?

BBC journalist Jordan Dunbar talks us through the different AI therapy apps that are out there, how they work and whether they come with data privacy concerns. We also hear from BBC reporter Kelly Ng, who tells us why more young people in China are using DeepSeek for therapy. And psychologist Maytal Eyal tells us about the pitfalls of swapping professional therapists for AI chatbots.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producer: Emily Horler, Julia Ross-Roy, Adam Chowdhury and Chelsea Coates Video Journalist: Tim Hodges Editor: Verity Wilde