Seriously...

The sounds of casting, chiming, singing and clanging are fused together to make a magical sound track to the story of how meat cleavers have been used as musical instruments for over 300 years.. Growing up in Suffolk, Nathaniel Mann, heard stories passed down by his grandma about a tradition of the village Rough Band, made up of pots and pans, iron and metal implements, including meat cleavers - delivering a sort of sonic warning to anyone stepping out of line, committing adultery or behaving in way considered unacceptable. As part of the Avant-Folk trio 'Dead Rat Orchestra', Mann, a singer and composer, has long been playing music with strange percussive instruments. Coming across an old meat cleaver in his dad's garage he was inspired to make a set of cleavers to play music on - so turned to a bronze bladesmith to help turn meat cleavers into musical gold. In a chance discovery, he discovered the idea wasn't new - and so he sought out Jeremy Barlow, author of “The Enraged Musician”, to find out the coded messages of Hogarth’s musical prints, including marrow bones and meat cleavers. He also visits BathIRON 2018, as a new bandstand is being cast for the city of Bath, and gets the chance to conduct and sing with an orchestra of master smiths. The freshly cast meat cleaver is finally used in one of the Nest Collective's Campfire Concerts, where the Dead Rat Orchestra join a trio of female folk musicians from Poland - Sutari - who have developed their own parallel world of Rough Music. A joyful celebration, some nail biting forging, and some entrancing music. You've never heard cleavers like this before.... Producer: Sara Jane Hall

Artist Emma Critchley meets filmmakers, photographers, sculptors and painters who are drawn beneath the sea to create underwater art. Julie Gautier performs a graceful, lyrical ballet on the floor of the deepest pool in the world. Without a tank of air or mask, she dances magically through crystal-clear waters across a sunken stage. In the azure waters of the world, sculptor Jason deCaires Taylor uses the seabed as his canvas. He has installed hundreds of life-sized, concrete people on the sea floor. Fish weave through his couple playing on sea-saw, tourists taking photographs or migrants huddling in a raft. As Jason works towards the opening of his first cold water installation, Emma asks what draws him to the sea, the meaning of his work and how audiences can engage with underwater art. She explores the unpredictability of working with the sea, hearing stories of storms, seasickness and near drowning. Suzi Winstanley is petrified of the deep, but her passion for documenting wildlife has taken her to the remotest and coldest places in the world. With fellow artist Olly Williams, they collaborate to paint, lightning-fast, their experience of encountering white shark and leopard sea. Emma braves the wintery British waters to talk concentration, boundaries and time with artist Peter Matthews who immerses himself in the ocean for hours, sometimes days, floating with his drawing board and paper. Sunlight dances on the twisting fabrics of headless bodies in photographer Estabrak’s pictures. For her, working in Oman, underwater is the only safe space to tell stories. For some the pull of the sea is political, for others environmental, but all the artists find extraordinary freedom in this huge untapped underwater world. Producer: Sarah Bowen

Laurie Taylor investigates the people who hear the voices of the dead in recorded sounds - and uncovers the strange and haunting world of auditory illusion. Believers in EVP, or Electronic Voice Phenomena think they're hearing the voices of the beyond - messages captured in the throb and static of white noise. Laurie Taylor's a rationalist - he doesn't go in for this mumbo-jumbo. But whilst the peculiar world of EVP may not be evidence of the afterlife, it does show how we're susceptible - far more susceptible than we might have ever believed - to be deceived by our ears. Laurie takes us on an mind-bending journey through the world of aural hallucination and illusion - revealing how the ghosthunters of EVP actually are showing off something rather profound about the flaws in our auditory perception...and they way we scrabble for meaning in the booming, buzzing confusion of the world around us. Contributors include the acclaimed expert on auditory illusion Diana Deutsch, writer and sound artist Joe Banks, neurologist Sophie Scott and parapsychologist Ann Winsper. Producer: Steven Rajam for BBC Wales

Alex Bellos is brilliant at all things mathematical, but even he can't hold a candle to the amazing mathematical feats of the supercalculators. Alex heads to Wolfsburg in Germany to meet the contestants at this year's Mental Calculation World Cup. These men and women are the fastest human number crunchers on the planet, able to multiply and divide large numbers with no need to reach for a smart phone, computer or calculator. So how do they do it, and is it a skill that any of us can learn? Alex talks to Robert Fountain, the UK's two-time winner of this prestigious prize, about his hopes for this year's competition and the mathematical magicians of the past who have inspired him. He also meets Rachel Riley, Countdown's number queen, to find out what it takes to beat the countdown clock.

Donald Trump's pledge to build a "big beautiful wall" along the US-Mexico border has inserted a political urgency into the mainstream art world and made the Latino experience a point of inspiration for many. Seven artists working on either side of the border wall, from the Pacific Ocean in the west to the Gulf of Mexico in the east, describe their work and how recent US immigration policy has helped to shape it. From music, to sculpture, virtual reality and performance art, the Art of Now explores the diverse artistic scene thriving along the 2000 miles border. Producer: Sarah Shebbeare

Discover the origins and popularity of instant noodles worldwide, including their impact on people's lives and the story of their inventor. Meet Tom Tantin, the world's most prolific instant noodle reviewer who has tried over 6,300 types of noodles. Explore the cultural significance of instant ramen noodles and their use as currency in US prisons. Learn about the constant and lasting popularity of instant noodles, making them a convenient and affordable meal option for 60 years.

The story of knife crime, told in verse by the weapon itself. Why do teenagers carry knives? How does it feel to live in a world where that's normal? How should we respond to the moral panic generated by the current wave of youth crime? Momtaza Mehri, Young People's Poet Laureate for London, presents a verse-journey into the thoughts and feelings of those for whom knife crime is an everyday reality. Perpetrator or victim, armed or defenceless, all the lines blur in "Ballad of the Blade" - a poem told in the voice of the knife as it travels on a chilling arc out of a child's bedroom, through fear, a yearning to belong and succeed, ruin and - sometimes - redemption. First-person voices from London and Sheffield splinter through the poem, reflecting the mosaic of lives affected by youth violence - bereaved youngsters and determined parents, criminals and youth workers. "Ballad of the Blade" is scored by Jon Nicholls. The programme was devised by Andrew Efah of BBC II! Producer Monica Whitlock.

The Sound Odyssey is a new series in which Gemma Cairney takes British artists for musical collaborations in different countries around the world, hearing the musicians in a new light, and exposing their artistic process as they create something new in different and unfamiliar surroundings with an artist they have never met before. In the first of a series of journeys Nadine Shah a British Muslim artist travels to Beirut, to collaborate with Lebanese singer songwriter and musicologist Youmna Saba. The challenge will be for them to create a track together in Beirut in just two days. Both have very different musical styles and cultural heritages. Nadine was born in Whitburn, South Tyneside, to an English mother of part-Norwegian ancestry and a Pakistani father. Her music is very much inspired by conflict, immigration, and cultural and religious identity, and her latest Mercury Prize nominated album, Holiday Destination was written about the Syrian refugee crisis. Although Nadine's lyrics have been very much inspired by the conflict in Syria she has never been to the Middle East. Youmna Saba holds a master's degree in Musicology, focusing mainly on the parallels between classical Arabic music and Arabic visual art. She is a part-time instructor at the musicology department at the Antonine University. Her sound borrows elements from the Arabic music tradition, and blends them with electronic treatments, sonic textures and loops. They will meet and collaborate in Beirut, a city once ravaged by civil war that has been gaining a reputation as a burgeoning cultural hub where cultural and religious diversity sits side by side. Once dubbed "the Paris of the Middle East", the Lebanese capital is a beautiful and daringly hopeful vision of what the future of the region might hold - A city of new ideas -art, fashion, political movements, multiculturalism and a thriving music scene. Whilst in the city Gemma Cairney meets local artists including Dima Matta the host of Cliffhangers, a storytelling group and platform which offers a safe space for people to express themselves in a country where this is very problematic and censorship is very much a real thing. And we hear from Syrian rock group Tanjaret Daghet, who now live in Beirut as exiles, anxious about their families and homes. Presented by Gemma Cairney Produced by Jax Coombes A BBC 6 Music Production for BBC Radio 4.

In February 2017, President Trump made a speech to his supporters. He moved on to the topic of immigration and Sweden. "You look at what's happening last night in Sweden," he told the crowd at a rally in Florida. "They took in large numbers; they're having problems like they never thought possible". This confused the Swedes because they hadn't noticed anything happening on that Friday night in their country. What Trump was referring to was a Fox News report he had seen about immigration and crime in Sweden. The report twisted a story done by Ruth Alexander for Radio 4's More or Less programme and used misleading statistics to try to show that recent immigrants were responsible for a crime wave in Sweden. More or Less debunked the report and its use of statistics but since then there has been spate of violent crime in Sweden. Ruth Alexander travels to Stockholm and Malmö to find out the truth about what's going on. Producer: Keith Moore.

According to Charles W. Eliot - President of Harvard and cousin of T.S. - everything required for a complete, liberal education could fit on a shelf of books just 5-feet in length. In 1909 the first volume of the Harvard Classics were published - and grew to become a 51-volume anthology of great works, including essays, poems and political treatises. But what if people today from all walks of life were asked to recommend books to be included on a five foot shelf? Which books do they think might be required for a complete home education? Ian Sansom has set a course for Wigtown - Scotland's National Booktown - to find out. Local craftsman Steve has been busy creating just the shelf for the job - exactly five foot long - and fashioned from elm wood and whiskey barrels recycled from a local distillery. Ian will be playing shopkeeper at the Open Book in Wigtown - a B&B meets bookshop which allows visitors to indulge their fantasy of running their own bookstore. With Ian parked behind the counter, all that's needed is for visitors to drop by and try to persuade him of the books they think deserve a rightful place on The Five Foot Shelf. But of course not everything will make it on and as custodian of the shelf, Ian can be ruthless. Well, kind of... No academics. No critics. No nonsense. The Five Foot Shelf is a guide for readers by readers about the books which matter to them. Producer: Conor Garrett.