What in the World

Nostalgia. That reminiscent, comforting feeling of something from the past that is familiar. We get it with different things, from fashion to TV shows and music. In the last few years, there’s been a huge rise in things like y2k fashion, old school technology like flip phones and digital cameras, and even Kate Bush has made it back into the charts.So why do Gen Z care so much about old things? Professor Ryan Lizardi tells us more about how nostalgia works, when it’s bad for you, and how marketing is keeping old things alive. We also hear how nostalgia is interpreted from Marie Tusiama in the Ivory Coast, who runs a successful y2k Instagram page. And what does nostalgia mean in Portuguese and Brazilian culture? Well, we hear from someone else in the Gelbart family - Ben tells us about his favourite Portuguese word, ‘saudade’. Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Imogen James Editor: Verity Wilde

Are you an extrovert or an introvert? Do you enjoy small talk with strangers or do you do everything you can to avoid catching their eye? Type A or Type B?Right now the internet is obsessed with these labels. Personality types, birth charts, attachment styles, Myers Briggs, colour coding your aura.These days the internet is full of tests that attempt to define who you are by answering questionnaires, but the reality is more complicated. We go through these trends with Claudia Hammond, a psychologist and BBC presenter. Plus we hear from BBC colleagues in other parts of the world. Yuna Ku tells us the trends around personality types in South Korea and Makuochi Okafor in Nigeria explains how Igbo culture defines people’s characteristics according to four categories.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Video producer: Baldeep Chahal Producers: Benita Barden, Julia Ross-Roy and Rio Rennalls Editor: Emily Horler

From the Caribbean to the Mediterranean, tonnes of seaweed is turning up on beaches in ever bigger quantities. Seaweed blooms — massive, rapid accumulations of seaweed — are smelly and can release toxic gases. They’re also crowding out native plants. So where is all this seaweed coming from and is it down to climate change? BBC climate and science correspondent Georgina Rannard explains what effect this extra seaweed is having on biodiversity. Lots of countries and scientists are trying to work out what to do with all this seaweed - and even find ways to use it in the fight against climate change. We speak to Santiago Stebelski, who’s 20 and from Mexico. He and his brother have just founded a company called Sargolico, which aims to convert sargassum seaweed into bioplastic. Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy, William Lee Adams and Adam Chowdhury Editor: Emily Horler

Football fans all around the world are gearing up for the 2026 Men’s World Cup. It’s set to be a historic tournament and will be hosted by three countries for the first time: the United States, Canada and Mexico. But some fans says it will make the history books for the wrong reasons - because of the jump in ticket prices.Group-stage tickets are up to three times more than those for the 2022 World Cup in Qatar and the cheapest ticket for the final will cost hundreds of dollars. FIFA has announced that it will release a small number of more affordable tickets, but some fans say this is not enough.BBC Africa Sports Reporter Celestine Karoney explains the costs of attending the 2026 World Cup - and how the tournament could also be affected by US‘ immigration policy. We also hear from fans in Cape Verde, which has qualified for the tournament for the first time, and in the Ivory Coast about the barriers they have faced when trying to get tickets to World Cup matches.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison, Maria Clara Montoya and Chelsea Coates Editor: Verity Wilde

Are your work emails too polite? Do you use unnecessary punctuation and emojis? Career experts have told the BBC that using multiple exclamation marks can seem fake or could impact credibility.The BBC’s Culture reporter Yasmin Rufo has been looking at how the emails you write might be making you come across as less competent and less professional.Plus we’re joined by William Lee Adams who describes what it’s like communicating with people from all over the world at the BBC World Service and considering the email or message culture of different countries.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden and Adam Chowdhury Editor: Verity Wilde