Ben Garrod and Jess French get under the skin of Mola mola the world's largest bony fish to unravel this bizarrely shaped predator's ability to swim to a huge range of depths. Producer Adrian Washbourne

Wild Inside: The Ocean Sunfish

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Dr Julia Ravey and Dr Ella Hubber both have a love of science, but it turns out there’s a lot they don’t know about some of the leading women at the front of the inventing game. In Unstoppable, Dr Julia and Dr Ella tell each other the hidden, world-shaping stories of the engineers, innovators and inventors they wish they’d known about when they were starting out as scientists. This week, the story of the woman who mastered viewing the world in microscopic detail – ultimately helping us discover the structure of DNA.  Florence Bell’s scientific career began in the 1930s whilst studying at Cambridge University. The University didn’t grant degrees to women at the time, but this didn’t dissuade Florence. She was so talented at an imaging technique called X-ray crystallography that she started a PhD in the field – and it was during this time that she would make a pivotal discovery about the molecule of life.  Florence is an unsung hero of the DNA story. Her work laid the foundation for a vital field of research, yet her contribution was buried for years. Dr Julia and Dr Ella tell Florence’s tale, with input from Dr Kersten Hall, science historian and visiting fellow at the University of Leeds.  Presenters: Dr Ella Hubber and Dr Julia Ravey 
Producers: Ella Hubber and Julia Ravey 
Assistant producer: Sophie Ormiston 
Production Coordinator: Elisabeth Tuohy
Editor: Holly Squire  (Photo: Florence Bell.  Credit: Courtesy of her son Chris Sawyer. No reuse)

Unstoppable: Florence Bell

Dr Julia Ravey and Dr Ella Hubber both have a love of science, but it turns out there’s a lot they don’t know about some of the leading women at the front of the inventing game. In Unstoppable, Dr Julia and Dr Ella tell each other the hidden, world-shaping stories of the engineers, innovators and inventors they wish they’d known about when they were starting out as scientists. This week, the story of an engineer who turned plastic into gold, all starting from her mother’s backyard.   Every day, around 500 tonnes of plastic waste is generated in the Kenyan city of Nairobi. Hardly any of it is recycled – but engineer Nzambi Matee is on a mission to change that. Frustrated by the level of pollution, in 2017 Nzambi constructed a laboratory in her mother’s backyard. It was here that she used her self-taught engineering skills to convert plastic waste into bricks that are stronger and more eco-friendly than concrete.  Since then, Nzambi’s backyard operation has grown into a company – Gjenge Makers – and the bricks are widely used across Nairobi. And at only 31, Nzambi is just getting started. As Dr Julia and Dr Ella trace Nzambi’s journey, we hear from Nzambi herself about what it took to get to this point, as well as her ambitions for the future.  Presenters: Dr Ella Hubber and Dr Julia Ravey 
Producers: Ella Hubber and Julia Ravey 
Assistant producer: Sophie Ormiston 
Production Coordinator: Elisabeth Tuohy
Editor: Holly Squire (Photo: Nzambi Matee, Kenyan entrepreneur and inventor, holds plastic polymer recycled to make bricks. Credit: SIMON MAINA/AFP via Getty Images)

Unstoppable: Nzambi Matee

Dr Julia Ravey and Dr Ella Hubber both have a love of science, but it turns out there’s a lot they don’t know about some of the leading women at the front of the inventing game. In Unstoppable, Dr Julia and Dr Ella tell each other the hidden, world-shaping stories of the engineers, innovators and inventors they wish they’d known about when they were starting out as scientists. This week, the story of the Hollywood starlet whose brilliant ideas would go on to revolutionise the way we live.  Known as the ‘most beautiful woman in film’ during the 1940s, Hedy Lamarr was one of the most in demand Hollywood actresses of her time. But she wasn’t just a movie star. From a young age, she also had a knack for inventing – she liked to take her toys apart just to see how they worked. And she carried this passion into her adult life – creating an invention that laid the groundwork for technology many of us couldn’t live without: Wi-Fi, Bluetooth, and GPS.  But it didn’t come without struggle. Dr Julia and Dr Ella take us through Hedy’s remarkable journey, and we get a first-hand look into Hedy’s life from her daughter Denise Loder-DeLuca.  Presenters: Dr Ella Hubber and Dr Julia Ravey 
Producers: Ella Hubber and Julia Ravey 
Assistant producer: Sophie Ormiston 
Production Coordinator: Elisabeth Tuohy
Editor: Holly Squire (Photo: Hedy Lamarr, Austrian-born American actress and inventor. Credit: Eric Carpenter/John Kobal Foundation/Hulton Archive/Getty Images)

Unstoppable: Hedy Lamarr

The process of childbirth can be painful yet amazing, but at times and in some places, also very dangerous. Recorded in Malawi, East Africa, Claudia Hammond is joined by a panel of maternal health experts to figure out why it is that the equivalent of a large jumbo jet full of women die every day due to pregnancy or childbirth. Together, they examine how so many women can still be at risk during this period despite a greater access to healthcare. They also look into whether an eighty-year-old drug could be a game-changer when it comes to haemorrhage. Plus, they consider a study of 1.3 million women which asked what it is that women actually want from maternal healthcare. With Owen Chikwaza from the Malawi Ministry of Health, Linda Mipando of Kamuzu University and Elimase Kamanga-Gama, Director of the White Ribbon Alliance Malawi, Claudia looks at the many challenges and successes within the field, drawing from local experiences to offer global insights.  Produced by: Margaret Sessa-Hawkins
Editor: Holly Squire 
Production Coordinator: Siobhan Maguire 
Presenter: Claudia Hammond 
Studio Engineers: Andrew Saunderson and David Sproule  (Photo: Pregnant woman being examined by a doctor. Credit: Holly Squire BBC)

The Evidence: Maternal Health in Malawi

Underwater cameraman Roger Munns set himself and his team an incredible challenge. In 2008, they visited Tonga to film the biggest courtship ritual of the animal kingdom, the humpback heat run, for the very first time underwater and up close.  In the first few days, Roger had intimate encounters with the whales but most of the time, he was sat on the back of the boat, waiting to find a heat run. After two unsuccessful weeks, he started to wonder whether they would ever see one.   But a few days later somebody spotted a heat run, and everything sprang into action. Roger got in position and dove down ten meters underwater on a single breath. From then on, his job was just to wait and hold his camera ready. In a moment that seemed to stretch out time, he waited, nervously, for a group of 40-ton bus-sized whales to speed past him…  And Victor Vescovo describes his adventures into the deep, diving to the deepest parts of all five oceans.   Victor's longest dive was solo to the lowest point on Earth - the Challenger Deep at the bottom of the Marianas trench in the western Pacific. On reaching the bottom, some 35,853 feet below the ocean surface, should something have gone wrong, there was no hope of rescue.   Victor describes his feelings before making this historic descent and on the way down. Touching down on the sea bed, he was astounded by the abundance of marine life. Victor describes how he hopes that the mapping, observations and sample collections he has made on his dives will advance scientific understanding of the deep oceans, and where his eternal quest to explore might take him next.  Produced by Florian Bohr and Diane Hope   Credits:  Humpback whale mother and calf sounds - Acoustic Communications CNRS team & CETAMADA  Humpback whale calf sounds - Lars Bejder (MMRP Hawaii), Peter T. Madsen (Aarhus University) & Simone Videsen (Aarhus University)

Wild Inside: The Ocean Sunfish

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