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Melvyn Bragg and guests discuss the 30 year search to solve all the biggest questions in physics. At the end of the last century, brave voices were predicting that all the big questions of physics were on the verge of being answered by a Theory of Everything. The disparity between the physics of the very small would finally be reconciled with the very large, and the four forces of nature would finally be united with a single set of equations. It was suggested that with such a theory we might solve the riddle of black holes, unlock the secrets of the Big Bang, probe other universes and even uncover the mystery of travelling through time. But Stephen Hawking, who once said that with a Theory of Everything “we would know the mind of God”, has changed his mind and now says that it may not be possible after all. So what are the prospects for a Theory of Everything? Why do we need one? How do we get one? And what would it mean if we did? With Brian Greene, Professor of Physics and Mathematics at Columbia University and author of The Fabric of the Cosmos; John Barrow, Professor of Mathematical Sciences at the University of Cambridge and author of The Constants of Nature; Dr Val Gibson, particle physicist from the Cavendish Laboratory and Fellow of Trinity College, Cambridge.

25 Maalis 200442min

Melvyn Bragg and guests discuss the Vikings’ myths. Thor’s huge hammer, the wailing Valkyrie, howling wolves and fierce elemental giants give a rowdy impression of the Norse myths. But at the centre of their cosmos stands a gnarled old Ash tree, from which all distances are measured and under which Valhalla lies. In the first poem of The Poetic Edda, where the stories of the Norse Gods are laid down in verse, the Seeress describes it in her prophesy: “I know that an ash-tree stands called Yggdrasil,a high tree soaked with shining loamfrom there come the dews which fall in the valley, ever green, it stands over the well of fate.” It is from this tree that the father of the Gods, Odin, will ultimately hang himself: an image of divine sacrifice so problematic for thirteenth century Christians that they left it out when they wrote the myths down.What was the theology that inspired the Vikings and what role did their myths and religion play in their daily lives?With Carolyne Larrington, Tutor in Medieval English at St John’s College, Oxford; Heather O’Donoghue, Vigfusson Rausing Reader in Ancient Icelandic Literature in the Department of English at Oxford University; John Hines, Professor of Archaeology at Cardiff University.

11 Maalis 200442min

Melvyn Bragg and guests discuss the interpretation of dreams. Over a hundred years ago, Sigmund Freud declared confidently, “The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind”. He was writing in his famous volume, The Interpretation of Dreams and his ideas made a huge impact on the century that was to follow. However, despite the cultural influence of his work, there is still no agreement in neuroscience as to the function or mechanism of dreaming; this is partly because for much of the century the prevailing wisdom was that there was no meaning to dreams at all.What is the mental circuitry that creates our dreams? If they have no meaning, why do we dream them? And why is the tide turning with neuroscientists starting to find reasons to take dreams seriously again?With Professor V S Ramachandran, Director of the Center for Brain and Cognition at the University of California, San Diego; Mark Solms, Professor of Neuropsychology at the University of Cape Town; Martin Conway, Professor of Psychology at the University of Durham.

4 Maalis 200428min

Melvyn Bragg and guests discuss the Mughal Empire which, at its height, stretched from Bengal in the East to Gujarat in the West, and from Lahore in the North to Madras in the South.  It covered the whole of present day northern India, Pakistan, Afghanistan and Bangladesh, and became famous for the Taj Mahal, the Koh-i-Noor and the Peacock Throne.  In 1631 a Dutch naturalist Johannes de Laet published his account of the vast Empire, “the nobles live in indescribable luxury and extravagance, caring only to indulge themselves whilst they can, in every kind of pleasure.  Their greatest magnificence is in their women’s quarters, for they marry three or four wives or sometimes more”.But were they really the opulent despots of European imagination?  If so, how did they maintain such a vast territory?  And to what extent was the success of the British Raj a legacy of their rule? With Sanjay Subrahmanyam, Professor of Indian History and Culture at the University of Oxford; Susan Stronge, Curator in the Asian Department of the Victoria and Albert Museum, London; Chandrika Kaul, Lecturer in Imperial History at the University of St Andrews.

25 Helmi 200427min

Melvyn Bragg and guests discuss Ernest Rutherford. He was the father of nuclear science, a great charismatic figure who mapped the landscape of the sub-atomic world. He identified the atom’s constituent parts, discovered that elemental decay was the cause of radiation and became the first true alchemist in the history of science when he forced platinum to change into gold. He was born at the edge of the Empire in 1871, the son of Scottish immigrant farmers and was working the fields when a telegram came from the great British physicist J J Thomson asking him to come to Cambridge. Rutherford immediately laid down his spade saying "that’s the last potato I ever dig". It was. He went on to found a science, win a Nobel Prize and pioneer the ‘big science’ of the twentieth century. With Simon Schaffer, Professor in the History and Philosophy of Science at the University of Cambridge; Jim Al–Khalili, Senior Lecturer in Physics at the University of Surrey; Patricia Fara, Fellow of Clare College, Cambridge.

19 Helmi 200428min

Melvyn Bragg and guests discuss a transcendental idea that took hold on the Age of Enlightenment. When the English essayist John Hall translated the work of an obscure Roman thinker into English, he could hardly have known the ferment it would cause; for the work of Longinus introduced late 17th century Britain to the idea of the sublime – an idea that stalked the proceeding century. Longinus wrote, “As if instinctively, our soul is lifted up by the true sublime; it takes a proud flight, and is filled with joy and vaunting, as though it had itself produced what it had heard”.He was talking about the power of language, but in the 18th century the idea was set for a broader stage as British artists, poets, philosophers and scientists grappled with the sublime and adapted it to great swathes of the intellectual and physical landscape. What drove the great minds of the age to invest so much in the defining of the state of awe?With Janet Todd, Professor of English Literature at the University of Glasgow; Annie Janowitz, Professor of Romantic Poetry at Queen Mary, University of London; Peter de Bolla, Lecturer in English at the University of Cambridge.

12 Helmi 200442min

Melvyn Bragg and guests discuss the Battle of Thermopylae. For the historian Herodotus, the Battle of Thermopylae was the defining clash between East and West: “The Persians fell in their scores, for the officers stood behind lashing them forward, forward all the time. Many fell into the sea and were drowned, many more were trampled to death by their comrades ... The Greeks knew they were doomed now the Persians had discovered a way round the hill, and put forth their last ounce of strength, utterly desperate, utterly unsparing of their lives. (King) Leonidas fell in this battle. He had proved himself a great and brave man”.A force of three hundred free Spartans and their King had stood and fallen before an invading army of three million, led by a brutal tyrant. Or so the story goes – such was their courage and its association with freedom that, nearly two and a half thousand years later, William Golding wrote, “A little of Leonidas lies in the fact that I can go where I like and write what I like. He contributed to setting us free”.How important are the Greek/Persian wars to the story of democracy? Was the West and its values really so far removed from life in the Persian Empire?With Tom Holland, historian and author of Persian Fire; Simon Goldhill, Professor in Greek Literature and Culture at King’s College, Cambridge; Edith Hall, Leverhulme Professor of Greek Cultural History at the University of Durham and author of Inventing the Barbarian: Greek Self-Definition through Tragedy.

5 Helmi 200442min

Melvyn Bragg and guests discuss the origins and history of codes. In October 1586, in the forbidding hall of Fotheringhay Castle, Mary Queen of Scots was on trial for her life. Accused of treason and denied legal representation, she sat alone in the shadow of a vast and empty throne belonging to her absent cousin and arch rival Elizabeth I of England. Walsingham, Elizabeth’s Principal Secretary, had already arrested and executed Mary’s fellow conspirators, her only hope lay in the code she had used in all her letters concerning the plot. If her cipher remained unbroken she might yet be saved. Not for the first time the life of an individual and the course of history depended on the arcane art of Cryptography.What are the origins of this secretive science? And what links the ‘Caesar Cipher’ with the complex algorithms which underpin so much of our modern age?With Simon Singh, science writer and author of The Code Book: The Secret History of Codes and Code-Breaking; Professor Fred Piper, Director of the Information Security Group at Royal Holloway, University of London and co-author of Cryptography: A Very Short Introduction; Lisa Jardine, Professor of Renaissance Studies at Queen Mary, University of London and author of Ingenious Pursuits.

29 Tammi 200442min