Philip Ball tells the story of Alexis Carrel, the French surgeon who worked to preserve life outside the body and create an immortal chicken heart in a dish. His quest was to renew ageing flesh, repair and rebuild our bodies and keep them healthy far beyond the usual human lifespan. In the early twentieth century his science was pioneering but his mission to achieve eternal life was underpinned by a dark and terrifying agenda. Carrel was a racist who advocated eugenics to preserve the superior civilisation of the West.
Philip Ball discusses the history and cultural impact of the tissue culture techniques developed by Carrel with social historian Professor Hannah Landecker of the University of California at Los Angeles. And he finds out about the legacy of Carrel's research from Dr Madeline Lancaster of Cambridge University, one of the pioneers of the growth of brain organoids from stem cells; small clusters of neurons and other cells, rather like mini organs no bigger than a dried pea.
Ramon Llull: the medieval prophet of computer science
Philip Ball tells the story of Ramon Llull, the Medieval prophet of computer science. During the time of the Crusades Llull argued that truth could be automated and used logic over force to prove the existence of the Christian God. It was a dangerous idea that got him thrown into prison and threatened with execution but today he is hailed, not as a prophet of the Christian faith, but of computer science.
Philip Ball talks to historian Pamela Beattie of the University of Louisville in Kentucky about Ramon Llull's life and times in 13th century Catalonia, and to mathematician and Simonyi Professor for the Public Understanding of Science at Oxford University, Marcus du Sautoy, about the legacy of Llull's ideas in combinatorics, a branch of mathematics that explores how we can arrange a set of objects.
Note: Many thanks to Carter Marsh & Co for the recording of mechanical sounds.
Ignaz Semmelweiss: The Hand Washer
Lindsey Fitzharris tells the story of Ignaz Semmelweiss, the hand washer. In a world that had no understanding of germs, he tried to apply science to halt the spread of infection. Ignaz Semmelweis observed that many young medical students at his hospital in Vienna went directly from an autopsy, still covered in contaminated dead flesh, to attend pregnant women. Could this be the reason for such high maternal mortality rates from conditions like puerperal fever? Believing that the disease was caused by “infective material” from a dead body, Semmelweiss set up a basin filled with chlorinated lime solution in his hospital and began saving women’s lives with three simple words: ‘wash your hands’. He was demonised by his colleagues for his efforts, but today, he is known as the “Saviour of Mothers.”
Lindsey Fitzharris discusses some of the common myths surrounding the story of Semmelweiss with Dr Barron H. Lerner of New York University Langone School of Medicine. And she talks to Professor Val Curtis, Director of the Environmental Health Group at the London School of Hygiene and Tropical Medicine, who has studied the amount of hand washing by medical staff in hospitals today.
Main Image: Lindsey Fitzharris Credit: T. K. Smith
Ibn al-Haytham and How We See
Philip Ball's story is of Ibn al-Haytham, the first scientist, and his book of optics that defined how we see.
Lady Mary Montagu's Smallpox Experiment
Naomi Alderman's Science Story reveals how Lady Mary Wortley Montagu experimented on her own child in a quest to prove that smallpox inoculation works. Born in 1689 in a position of some power and influence, Lady Mary travelled to Constantinople as the wife of the ambassador to Turkey and witnessed 'variolation parties'. Here 'a nut shell' of virus on a needle is put in an opened vein to infer immunity. Having lost her own brother to smallpox and survived with terrible scaring herself, Lady Mary knew first hand the dangers of the deadly disease. She became the first person to bring smallpox inoculation to the West. Medical historian Lindsey Fiztharris tells the remarkable story of how condemned prisoners are given the opportunity to escape execution under the orders of King George I if they are given the virus and survive.
Tim Spector, Professor of Genetic Epidemiology at Kings College, London, and Naomi discuss some of today's counter intuitive treatments, such as faecal transplants.