In Our Time With Melvyn Bragg Folgen

Melvyn Bragg and guests Jim Al-Khalili, Frank Close and Frank James discuss the history of the discovery of radiation.Today the word 'radiation' conjures up images of destruction. But in physics, it simply describes the emission, transmission and absorption of energy, and the discovery of how radiation works has allowed us to identify new chemical elements, treat cancer and work out what the stars are made of.Over the course of the 19th century, physicists from Thomas Young, through Michael Faraday to Henri Becquerel made discovery after discovery, gradually piecing together a radically new picture of reality. They explored the light beyond the visible spectrum, connected electricity and magnetism, and eventually showed that heat, light, radio and mysterious new phenomena like 'X-rays' were all forms of 'electromagnetic wave'. In the early 20th century, with the discovery of radioactivity, scientists like Max Planck and Ernest Rutherford completed the picture of the 'electromagnetic spectrum'. This was a cumulative achievement that transformed our vision of the physical world, and what we could do in it.Jim Al-Khalili is Professor of Theoretical Physics and Chair in the Public Engagement in Science at the University of Surrey; Frank Close is Professor of Physics at Exeter College, University of Oxford; Frank James is Professor of the History of Science at the Royal Institution.

Melvyn Bragg and guests Diarmaid MacCulloch, Lucy Wooding and Charlotte Methuen discuss the Siege of Munster in 1534-35.In the early 16th century, the Protestant Reformation revolutionised Christian belief. But one radical group of believers stood out. The Anabaptists rejected infant baptism and formal clergy, and believed that all goods should be held in common. They were also convinced that the Second Coming was imminent.In 1534, in the north-western German city of Munster, a group of Anabaptists attempted to establish the 'New Jerusalem', ready for the Last Days before the coming Apocalypse. But the city was besieged by its ousted Prince-Bishop, and under the reign of its self-appointed King, a 25-year-old Dutchman called Jan van Leyden, it descended into tyranny. Books were burned, dissenters were executed and women were forced to marry. As starvation spread, King Jan lived in luxury with his 16 wives. The horrors of Munster have resonated through the European memory ever since. Diarmaid MacCulloch is Professor of the History of the Church at the University of Oxford; Charlotte Methuen is University Research Lecturer in Ecclesiastical History at the University of Oxford and Lecturer in Church History and Liturgy at Ripon College Cuddesdon; Lucy Wooding is Lecturer in Early Modern History at King's College, London.

Melvyn Bragg and guests AC Grayling, Beatrice Han-Pile and Christopher Janaway discuss the dark, pessimistic philosophy of Arthur Schopenhauer.As a radical young thinker in Germany in the early 19th century, Schopenhauer railed against the dominant ideas of the day. He dismissed the pre-eminent German philosopher Georg Hegel as a pompous charlatan, and turned instead to the Enlightenment thinking of Immanuel Kant for inspiration. Schopenhauer's central idea was that everything in the world was driven by the Will - broadly, the ceaseless desire to live. But this, he argued, left us swinging pointlessly between suffering and boredom. The only escape from the tyranny of the Will was to be found in art, and particularly in music. Schopenhauer was influenced by Eastern philosophy, and in turn his own work had an impact well beyond the philosophical tradition in the West, helping to shape the work of artists and writers from Richard Wagner to Marcel Proust, and Albert Camus to Sigmund Freud.AC Grayling is Professor of Philosophy at Birkbeck College, University of London; Beatrice Han-Pile is Professor of Philosophy at the University of Essex; Christopher Janaway is Professor of Philosophy at the University of Southampton.