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.

AC Grayling, Beatrice Han-Pile, and Christopher Janaway discuss the dark philosophy of Schopenhauer, focusing on the Will driving all existence. They explore Schopenhauer's rejection of Hegel, influence of Kant, and his view on suffering and boredom. The podcast delves into the role of art as an escape, Schopenhauer's impact on Eastern philosophy, and his influence on artists and writers like Wagner and Freud.

Geologists Richard Corfield, Jane Francis, and Sanjeev Gupta discuss Britain's geological history, from the separation of land masses to the shaping of the landscape. They uncover how continental movements and climate variations influenced Britain's evolution over millions of years. From tropical climates to deserts, the podcast explores the diverse transitions in Britain's geological past.

Melvyn Bragg and guests John Guy, Clare Jackson and Helen Hackett discuss the death of Queen Elizabeth I and its immediate impact, as a foreign monarch became King in the face of plots and plague.By the spring of 1603, Elizabeth had been Queen for 44 years, and it was clear that she would leave no heir. Many feared that her death would spark insurrection, led perhaps by Puritans, perhaps by Catholics, possibly with the support of Spain. As it became clear that she was dying, Elizabeth's chief minister, Sir Robert Cecil, put into action his covert strategy to secure the succession of King James the Sixth of Scotland.What follows is a story of plots, plague and high politics, as a foreign monarch brought a thoroughly Continental approach to Kingship to the English throne. James's accession was widely welcomed, but his relationship with Cecil was initially tense, and his long procession south from Edinburgh attracted both celebration and criticism. His treatise on Kingship, published on his succession, became a bestseller in London - at least until an outbreak of plague, which also drove him from the capital not long after he arrived. His coronation was hurried through to circumvent plots against him, but his triumphal entry into London had to be delayed until a year after Elizabeth's death. And, as the high expectations which first greeted James were increasingly frustrated, the English started to invoke the ghost of their dead Queen to criticise their new ruler.John Guy is a Fellow of Clare College, University of Cambridge; Clare Jackson is Lecturer and Director of Studies in History at Trinity Hall, University of Cambridge; Helen Hackett is Reader in English at University College, London.

Melvyn Bragg and guests Robert Gildea, Ruth Harris and Robert Tombs discuss the Dreyfus Affair, the 1890s scandal which divided opinion in France for a generation.In 1894, a high-flying Jewish staff officer in the French Army, one Alfred Dreyfus, was convicted of spying for the Prussians. He was publicly humiliated: before a large Paris crowd, he was stripped of his badges of rank and his sword was ceremonially broken. Some of those watching shouted 'Down with Judas!' Then he was dispatched to Devil's Island. But when it emerged that Dreyfus was innocent, a scandal erupted which engulfed the Army, the Church and French society as a whole, exposing deep political rifts, and the nation's endemic anti-Semitism. It pitted Catholics against Republicans, provoked fighting in the streets, and led to the prosecution of the novelist Emile Zola, after his famous J'Accuse polemic against those protecting the real spy and so prolonging Dreyfus's suffering. The Affair became so divisive that it posed a serious threat to the French Republic itself. Finally, in 1905, it prompted the separation of Church and State. The scandal and the anti-Semitism at the heart of it cast a very long shadow. In 1945, when the ultra-nationalist one-time 'anti-Dreyfusard' Charles Maurras was convicted of collaborating with the Nazis, he reacted by declaring that his punishment was Dreyfus's revenge. Robert Gildea is Professor of Modern History at Oxford University; Ruth Harris is Lecturer in Modern History at Oxford University; Robert Tombs is Professor of French History at Cambridge University.

Experts in Egyptology discuss Pharaoh Akhenaten's radical religious reforms in ancient Egypt, his shift to worshiping a single solar god Aten, the controversial changes in art and architecture, and the enduring fascination with Akhenaten and his wife Nefertiti despite attempts to erase them from history.

Melvyn Bragg and guests explore the feud between Newton and Leibniz over calculus, delving into plagiarism accusations, political motives, and the evolution of differential calculus. The podcast unravels the intense rivalry, with Leibniz's notation prevailing despite personal conflicts, shaping the modern mathematical landscape.

Martin Palmer and Annabel Brett discuss St Thomas Aquinas, highlighting his influence on Catholic theology, natural law, and just war theory. They explore his harmonization of reason and faith, his intellectual journey from Arabic scholars to Aristotle, and his profound encounter with God's love. The podcast delves into the historical context of Aquinas' time, his turbulent path, and his philosophical synthesis of Augustine and Aristotle.

Join Melvyn Bragg and guests as they unravel the mysteries of the Ediacara Biota, the ancient life forms that challenged Darwin's beliefs. Explore the unique characteristics of these Precambrian organisms and their significance in understanding evolution. Delve into the enigmatic world of the Ediacara biota, their rise, fall, and impact on modern-day animal assemblages. Discover the secrets of pre-Cambrian life and the intricate relationship between physical, chemical, and biological factors shaping diverse life forms.