Bonus. World of Secrets: The Killing Call

The University library in Tartu, in Estonia, is a large brutalist complex, surrounded by concrete water fountains and futuristic steel sculptures. But inside this unassuming building lies a hidden treasure: rare books worth thousands. In April 2022, some of these books were stolen, including historic editions by Alexander Pushkin. According to Europol, the European law enforcement agency, this theft was part of a criminal operation that targeted national libraries in 12 countries, including the Baltic states, Poland, Finland, Germany and France. It's been described as Europe’s largest book heist since War World Two. Who was behind it? My colleague Nina Nazarova from BBC Russian has been investigating this story. Plus, 7-year-old Nigerian online musical sensation Emmanuel plays keyboards and drums, and has been captivating audiences online, as BBC Pidgin’s Adesola Ikulajolu reports. This episode of The Documentary comes to you from The Fifth Floor, the show at the heart of global storytelling, with BBC journalists from all around the world. This is an EcoAudio certified production. (Photo: Faranak Amidi. Credit: Tricia Yourkevich.)

13 Sep 26min

During an unguarded conversation between President Putin and President Jinping in Beijing, the Chinese leader suggested that scientific developments meant that by the end of the century people might live until 150. So, what is it like to live to an old age and will 150 years ever be possible? We bring together two women in Australia, Janet and Myfanwy, with a combined age of 202. One of them still drives. The other stopped getting behind the wheel at 96. They say they both enjoy busy lives. Janet at 102 doesn’t relish the thought of being 150 though: “Think how doddery and staggery you would be.” And Mwfanwy adds: “I don’t want to live forever!” In another conversation, 87-year-old Elaine in the United States has this advice: “We’ve all been through difficult times, we’ve all had terrible things happen to us, but you just get past it, and you put one foot in front of the other and you just keep on going.” We also hear from three distinguished researchers who discuss the reality of living a long life and the science of anti-aging. This edition is from BBC OS Conversations, where we bring people together to share their experiences. Presenter: Rahul Tandon BBC producers: Iqra Farooq, Akwasi Sarpong, Laura Cress and Ash Mohamed Boffin Media producers: Richard Hollingham and Sue Nelson (Photo:An elderly man holding a walking stick. Credit: Joe Giddens/PA Wire)

13 Sep 25min

The global fertility supplements industry has an estimated worth of over 2 billion dollars, and it’s growing. Some experts have raised the alarm around poor regulation of companies and the products they sell.In this episode of BBC Trending we investigate Pink Stork and other supplement companies which say they can help you get pregnant. Now, they're being promoted heavily on social media and beyond. What is the science behind some of the claims?And what does this say about regulation of the supplements industry as a whole?Producer & Presenter: Kayleen Devlin Editor: Flora Carmichael

12 Sep 18min

Rodrigo Medellin loves bats. The Mexican conservationist has been obsessed with the often maligned creatures for over six decades. As a child, he kept blood in ice cube trays in his parents' freezer, to feed to his pet vampire bats. He went on to create Mexico City’s first ever bat festival, and to work with governments, universities, NGOs and researchers all over the world. To many, Rodrigo IS the "bat man."Like many Mexicans, he is also fiercely proud of the country’s native spirits: tequila and mezcal. The agave spirits are hugely important for Mexico’s economy, especially in the states of Jalisco and Oaxaca. Exports of the drinks are worth billions. Tequila and mezcal have become increasingly popular in recent decades, with sales boosted by big budget celebrity-owned brands designed to appeal to the US consumer. From Kendall Jenner to George Clooney, US celebrities have been riding high on the mass market appeal of the liquor. But the boom in these industries has had unintended consequences for Rodrigo's beloved bats. Often the agave the spirits are made from is harvested early, before the slow-growing plant can flower. This means bats cannot feed from the nectar, and critically, they can’t do their job as pollinators. This contributes to agave monocultures which are susceptible to disease and blight. Rodrigo explains how he wanted to change the way the industry works, creating a “bat-friendly” certification for tequila and mezcal producers who leave 5% of the agave untouched, to bloom. But why have so few brands been certified, why is the programme controversial for some producers, and why are bats a tricky sell as far as conservation for many people and communities? Sarah Treanor spends time with Rodrigo in Mexico City and Oaxaca to find out. A Bespoken Media production. Image: Rodrigo Medellin holding a bat (Credit: Paul Webala)

11 Sep 26min

How does a seemingly ordinary boy prove to be so extraordinary that he’s given a halo by the Catholic Church? Saint Carlo Acutis was just 15 years old when he died in 2006. William Crawley travels through Italy to the places most associated with the young Carlo to discover for himself what set this teenager apart from the rest.In Assisi, William meets Carlo’s mother Antonia Salzano Acutis who reveals how her son showed an unusual generosity for a teenager. He visits Carlo’s tomb, where Domenico Sorrentino, Bishop of Assisi, explains the connection between St. Francis and Carlo, as a bridge from the past to the present. At Carlo’s old school in Milan, Istituto Leone XIII, his former professor, Fabrizio Zaggia, recalls his curious mind. And contemporary students talk of how they can relate to the Saint who designed websites.But is it all too convenient for the Catholic Church in this Jubilee Year to find a saint that appeals to this younger generation? William ponders this in Rome with John Allen, editor of Crux, the online Catholic newspaper, before heading off to St Peter’s Square and the Dicastery for the Causes of Saints where Monsignor Alberto Royo explains the investigation into Carlo’s life to see if it was one of ‘heroic virtue’.Presenter: William Crawley Producer: Jill Collins Editor: Tara McDermott Production co-ordinator: Gemma Ashman Credit: Carlo Acutis Digital Memorial App: Artist Riccardo Benassi, Curator Milano Arte Pubblica, Commune di Milano (Photo: Antonia Salzano, mother of blessed Carlo Acutis, who spent his life spreading his faith online, poses in front of a portrait of her son, 4 April, 2025. Credit: Tiziana Fabi/AFP)

10 Sep 26min

The history of Gaza dates back more than 5000 years. In antiquity, it was a key port on the Mediterranean coast. Assyrians, Ancient Greeks, Romans, Byzantines and the Ottomans have all left their mark on this small territory. This rich history is seen by Palestinians as central to their identity. Amid the death and destruction of the war, the BBC’s Middle East Correspondent Yolande Knell meets the Palestinians who’ve desperately tried to save what remains of Gaza’s past.This episode of The Documentary comes to you from Assignment, investigations and journeys into the heart of global events

8 Sep 31min

Over the past year, BBC Eye has documented life in Ukraine’s second largest city, Kharkiv, helping to capture the deeply personal stories of those living under the continuing shadow of war. Just 30 kilometres from the Russian border, this Russian-speaking city has sustained some of the heaviest attacks of the war.Reporter Albina Kovalyova follows the stories of people who have nevertheless chosen to continue to live in Kharkiv. One, Adela Knapova, a writer from the Czech Republic who unexpectedly found love during a visit to this frontline city last year – and who uprooted her life in Prague to move to Ukraine to be with him. He’s an artist from Kharkiv, Konstantin Zorkin, who describes his belief in the transformative power of art and love. These personal stories of love and life are intercut with the violence Russia continues to unleash on this city of over a million people. And they are set against a shifting geopolitical backdrop, of ultimatums and recriminations and talks, as all the while the attacks on Kharkiv and Ukraine continue.Presenter & reporter: Albina Kovalyova Producer: Louise Hidalgo Editor: Rebecca Henschke Executive Producer: Michael SimkinImage: Adela and Konstantin (Credit: Konstantin Zorkin)

7 Sep 26min

Rising sea levels and a worldwide shortage of buildable land make the prospect of floating buildings and infrastructure more beneficial than ever. MAST is an architectural firm based in the southern harbour of Copenhagen in Denmark. Surrounded by shipbuilders and workshops, the MAST studio, run by two young passionate architects, devises and builds houses, community centres, saunas and whole neighbourhoods on water. While many of their projects can be seen on the waters of Copenhagen, the team is inspired by the long tradition of waterborne dwellings across the world and are currently working on constructions in Thailand, the Maldives, the USA , India and Portugal. Architecture critic and author Jonathan Glancey is invited to Copenhagen to see the studio in action and to travel out by boat to look at some of the completed projects.Presenter: Jonathan Glancey Producer: Susan Marling A Just Radio productionImage: MAST architects Marshall Blecher and Magnus Maarbjerg (Credit: Susan Marling)

7 Sep 26min