For decades, mangrove forests were disappearing at an alarming rate. Now, new satellite data reveals a hopeful shift. After years of decline, these vital coastal ecosystems are making a comeback.

In this episode, BBC environment correspondent Matt McGrath explains what mangrove forests are, why they suffered such significant losses from the 1980s through the 2010s and how advances in technology are allowing scientists to track their recovery from space. We also examine why mangroves are one of nature’s most powerful tools for protecting coastlines, storing carbon and helping communities adapt to climate change.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams and Benita Barden Video producer: Baldeep Chahal Editor: Verity Wilde

If someone you loved died, would you want to keep chatting to them? Now you can - with an AI griefbot. The idea is you use their texts, emails and voice notes, as well as photos and videos, to train AI to reply in the dead person’s tone and style. It can be through text-based conversation or even an AI-generated voice.

The "digital afterlife" industry is now worth more than $130 billion. Is this just the latest way for humans to try to maintain a relationship with their deceased loved ones? Or could it negatively affect the grieving process, if people start to believe that person is actually still alive through the technology? And what might companies do with all the data we input?

Tech journalist Tamzin Kraftman explains this growing area of tech and the pros and cons of using griefbots. Andy Langford, clinical director at Cruse, a bereavement charity in the UK, gives us his thoughts. And we hear from Muhammad Ahmad in the US, who developed his own grief bot of his dad.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy, William Lee Adams and Chelsea Coates Editor: Verity Wilde

Smart glasses are big business, Meta, one of the leading manufacturers of the glasses say that last year they sold seven million pairs globally. But new designs that resemble regular sunglasses or reading frames mean they can be difficult to spot. Users can make phone calls, follow maps, and use AI assistants completely hands free. They can also use the built in camera to take photos and record videos subtly - this is part of the controversy. There have been cases of people being filmed secretly and posted online without their consent.

So how many people are buying smart glasses and how significant is the risk to privacy? BBC technology reporter Laura Cress tells us about the tech that goes into smart glasses and investigative reporter Georgia Poncia talks us through the concerns.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producer: Benita Barden and Emma-Louise Amanshia Editor: Verity Wilde

Backrooms. Obsession. Bring Her Back. These are some of the biggest Hollywood films from the past 12 months and they have one thing in common: they are all horror movies directed by YouTubers.

What’s behind this new wave of directors coming from YouTube and why is horror becoming more and more popular? BBC journalist and horror obsessive Mel Ramsay explains how the likes of Kane Parsons and Curry Barker have shown how their success online can be translated to the box office.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Adam Chowdhury, Benita Barden and Chelsea Coates Editor: Verity Wilde

People in South Korea have been smashing their Starbucks mugs with hammers, a CEO has been fired and there have been protests on the streets, but why? Starbucks is the number one coffee chain in South Korea with over 2000 branches. Recently they launched a marketing campaign for a new reusable tumbler "SS Tank" and they've faced huge backlash. The release was on the same day as the anniversary of the 1980 Gwangju Uprising, a sad day in the history of the country which left more than a 200 people dead.

So what impact have the boycotts had? And what happens next? Jake Kwon the BBC's Seoul correspondent tells us about the Tank Day promotion, the financial implications and the wider context of the upset this has caused. We also hear from young people in South Korea on what they think about the boycott.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producer: Benita Barden and Emma-Louise Amanshia Editor: Verity Wilde

For millions of people living with obesity, weight loss drugs have been hailed as a game changer.

They’re known as GLP-1s but are more commonly known by their trade names: Ozempic, Wegovy and Mounjaro. So far they’ve only been made by two companies in Denmark and the US and they’re pretty expensive. But now the patents for these drugs have expired in China and India, which means pharmaceutical companies in those countries can now make cheaper copies.

India has a reputation as the "pharmacy of the world" because of its ability to turn expensive medicines into affordable mass-market products. The country is the world's largest supplier of generic medicines. Indian companies are already starting to produce and sell these weight loss drugs.

So what impact will this have on the cost and supply of weight loss drugs in India and around the world? Archana Shukla, the BBC’s India business correspondent in Mumbai, tells us why the expiry of the patents is such a big deal. And BBC Health correspondent James Gallagher explains how these drugs work.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Chelsea Coates, Julia Ross-Roy and Benita Barden Video Producer: Baldeep Chahal Editor: Verity Wilde

This year’s Fifa World Cup is the biggest yet. The football tournament is being co-hosted by Mexico, Canada and the United States and has a record 48 teams taking part. Four of those teams have qualified for the first time ever: Cape Verde, Curaçao, Jordan and Uzbekistan. In this episode, we get familiar with the debuting nations on and off the pitch with some of our BBC reporters, including Paul Njie, a senior journalist at BBC Africa, and Husam Assal, a BBC reporter in Amman.

Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: William Lee Adams, Benita Barden and Julia Ross-Roy Editor: Verity Wilde

On Thursday, US President Donald Trump threatened to take “total control" of Iran's oil and gas markets, and to seize Kharg Island. Just hours later though, he claimed an agreement to end the war with Iran was on the horizon and cancelled a third consecutive night of strikes.

Mixed messaging from the US President on this conflict is nothing new - but the island at the centre of this latest dispute has a huge role to play. It’s a small, rocky outcrop off of Iran’s coast - but it’s importance for the country’s oil infrastructure- and now for President Trump - is huge. So why is Kharg Island so important? And why does President Trump want it?

Ghoncheh Habibiazad, from the BBC’s Persian language service, joins us to unpack it all - and to explain what the consequences could be if President Trump decides to take the island.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producers: Chelsea Coates and Emily Horler Editor: Verity Wilde