Alan Turing

Melvyn Bragg and his guests discuss Japan's Sakoku period, two centuries when the country deliberately isolated itself from the Western world. Sakoku began with a series of edicts in the 1630s which restricted the rights of Japanese to leave their country and expelled most of the Europeans living there. For the next two hundred years, Dutch traders were the only Westerners free to live in Japan. It was not until 1858 and the gunboat diplomacy of the American Commodore Matthew Perry that Japan's international isolation finally ended. Although historians used to think of Japan as completely isolated from external influence during this period, recent scholarship suggests that Japanese society was far less isolated from European ideas during this period than previously thought.With:Richard Bowring Emeritus Professor of Japanese Studies at the University of CambridgeAndrew Cobbing Associate Professor of History at the University of NottinghamRebekah Clements Research Fellow of Queens' College and Research Associate at the Faculty of Asian and Middle Eastern Studies at the University of Cambridge.Producer: Thomas Morris.

4 Huhti 201342min

Melvyn Bragg and his guests discuss one of the simplest and most remarkable of all molecules: water. Water is among the most abundant substances on Earth, covering more than two-thirds of the planet. Consisting of just three atoms, the water molecule is superficially simple in its structure but extraordinary in its properties. It is a rare example of a substance that can be found on Earth in gaseous, liquid and solid forms, and thanks to its unique chemical behaviour is the basis of all known life. Scientists are still discovering new things about it, such as the fact that there are at least fifteen different forms of ice.Hasok Chang Hans Rausing Professor of History and Philosophy of Science at the University of CambridgeAndrea Sella Professor of Chemistry at University College LondonPatricia Hunt Senior Lecturer in Chemistry at Imperial College London.Producer: Thomas Morris.

28 Maalis 201339min

Melvyn Bragg and his guests discuss the work of Alfred Russel Wallace, a pioneer of evolutionary theory. Born in 1823, Wallace travelled extensively, charting the distribution of animal species throughout the world. This fieldwork in the Amazon and later the Malay Archipelago led him to formulate a theory of evolution through natural selection. In 1858 he sent the paper he wrote on the subject to Charles Darwin, who was spurred into the writing and publication of his own masterpiece On the Origin of Species. Wallace was also the founder of the science of biogeography and made important discoveries about the nature of animal coloration. But despite his visionary work, Wallace has been overshadowed by the greater fame of his contemporary Darwin.With:Steve Jones Emeritus Professor of Genetics at University College LondonGeorge Beccaloni Curator of Cockroaches and Related Insects and Director of the Wallace Correspondence Project at the Natural History MuseumTed Benton Professor of Sociology at the University of EssexProducer: Thomas Morris.

21 Maalis 201342min

Melvyn Bragg and his guests discuss the life and work of Anton Chekhov. Born in 1860, Chekhov trained as a doctor and for most of his adult life divided his time between medicine and writing. Best known for plays including The Cherry Orchard and Three Sisters, he is also celebrated today as one of the greatest of short story writers. His works are often powerful character studies and chronicle the changing nature of Russian society in the late nineteenth century.With:Catriona Kelly Professor of Russian at the University of OxfordCynthia Marsh Emeritus Professor of Russian Drama and Literature at the University of NottinghamRosamund Bartlett Founding Director of the Anton Chekhov Foundation and former Reader in Russian at the University of Durham.Producer: Thomas Morris.

14 Maalis 201342min

In a programme first broadcast in 2013, Melvyn Bragg and his guests discuss absolute zero, the lowest conceivable temperature.  In the early eighteenth century the French physicist Guillaume Amontons suggested that temperature had a lower limit.  The subject of low temperature became a fertile field of research in the nineteenth century, and today we know that this limit - known as absolute zero - is approximately minus 273 degrees Celsius.  It is impossible to produce a temperature exactly equal to absolute zero, but today scientists have come to within a billionth of a degree.  At such low temperatures physicists have discovered a number of strange new phenomena including superfluids, liquids capable of climbing a vertical surface.With:Simon Schaffer Professor of the History of Science at the University of CambridgeStephen Blundell Professor of Physics at the University of OxfordNicola Wilkin Lecturer in Theoretical Physics at the University of BirminghamProducer: Thomas Morris

7 Maalis 201342min

Melvyn Bragg and his guests discuss the life and work of the Victorian anthropologist and archaeologist Augustus Pitt-Rivers. Over many years he amassed thousands of ethnographic and archaeological objects, some of which formed the founding collection of the Pitt Rivers Museum at Oxford University. Inspired by the work of Charles Darwin, Pitt-Rivers believed that human technology evolved in the same way as living organisms, and devoted much of his life to exploring this theory. He was also a pioneering archaeologist whose meticulous records of major excavations provided a model for later scholars. With:Adam Kuper Visiting Professor of Anthropology at Boston UniversityRichard Bradley Professor in Archaeology at the University of ReadingDan Hicks University Lecturer & Curator of Archaeology at the Pitt Rivers Museum at the University of Oxford.Producer: Thomas Morris.

28 Helmi 201341min

David Bradshaw, John Bowen and Ann Pasternak Slater join Melvyn Bragg to discuss Evelyn Waugh's comic novel Decline and Fall. Set partly in a substandard boys' public school, the novel is a vivid, often riotous portrait of 1920s Britain. Its themes, including modernity, religion and fashionable society, came to dominate Waugh's later fiction, but its savage wit and economy of style were entirely new. Published when Waugh was 24, the book was immediately celebrated for its vicious satire and biting humour.With:David Bradshaw Professor of English Literature at Worcester College, OxfordJohn Bowen Professor of Nineteenth-Century Literature at the University of YorkAnn Pasternak Slater Senior Research Fellow at St Anne's College, Oxford.Producer: Thomas Morris.

21 Helmi 201341min

Jane Francis, Richard Corfield and Carrie Lear join Melvyn Bragg to discuss ice ages, periods when a reduction in the surface temperature of the Earth has resulted in ice sheets at the Poles. Although the term 'ice age' is commonly associated with prehistoric eras when much of northern Europe was covered in ice, we are in fact currently in an ice age which began up to 40 million years ago. Geological evidence indicates that there have been several in the Earth's history, although their precise cause is not known. Ice ages have had profound effects on the geography and biology of our planet.With:Jane Francis Professor of Paleoclimatology at the University of LeedsRichard Corfield Visiting Research Fellow in the Department of Earth Sciences at Oxford UniversityCarrie Lear Senior Lecturer in Palaeoceanography at Cardiff University.Producer: Thomas Morris.

14 Helmi 201342min