In Our Time

Melvyn Bragg and guests discuss the neutron, one of the particles found in an atom's nucleus. Building on the work of Ernest Rutherford, the British physicist James Chadwick won the Nobel Prize for Physics for his discovery of the neutron in 1932. Neutrons play a fundamental role in the universe and their discovery was at the heart of developments in nuclear physics in the first half of the 20th century. With Val Gibson Professor of High Energy Physics at the University of Cambridge and fellow of Trinity CollegeAndrew Harrison Chief Executive Officer of Diamond Light Source and Professor in Chemistry at the University of EdinburghAndFrank Close Professor Emeritus of Physics at the University of Oxford.

Melvyn Bragg and guests discuss the rise of the Sikh Empire at the end of the 18th Century under Ranjit Singh, pictured above, who unified most of the Sikh kingdoms following the decline of the Mughal Empire. He became Maharaja of the Punjab at Lahore in 1801, capturing Amritsar the following year. His empire flourished until 1839, after which a decade of unrest ended with the British annexation. At its peak, the Empire covered the Punjab and stretched from the Khyber Pass in the west to the edge of Tibet in the east, up to Kashmir and down to Mithankot on the Indus River. Ranjit Singh is still remembered as "The Lion of the Punjab."With Gurharpal Singh Professor in Inter-Religious Relations and Development at SOAS, University of LondonChandrika Kaul Lecturer in Modern History at the University of St AndrewsAndSusan Stronge Senior Curator in the Asian Department of the Victoria and Albert MuseumProducer: Simon Tillotson.

Agrippina the Younger was one of the most notorious and influential of the Roman empresses in the 1st century AD. She was the sister of the Emperor Caligula, a wife of the Emperor Claudius and mother of the Emperor Nero. Through careful political manoeuvres, she acquired a dominant position for herself in Rome. In 39 AD she was exiled for allegedly participating in a plot against Caligula and later it was widely thought that she killed Claudius with poison. When Nero came to the throne, he was only 16 so Agrippina took on the role of regent until he began to exert his authority. After relations between Agrippina and Nero soured, he had her murdered.With:Catharine Edwards Professor of Classics and Ancient History at Birkbeck, University of LondonAlice König Lecturer in Latin and Classical Studies at the University of St AndrewsMatthew Nicholls Associate Professor of Classics at the University of ReadingProducer: Victoria Brignell.

Melvyn Bragg and guests discuss Elizabeth Barrett Browning's epic "Aurora Leigh" which was published in 1856. It is the story of an orphan, Aurora, born in Italy to an English father and Tuscan mother, who is brought up by an aunt in rural Shropshire. She has a successful career as a poet in London and, when living in Florence, is reunited with her cousin, Romney Leigh, whose proposal she turned down a decade before. The poem was celebrated by other poets and was Elizabeth Barrett Browning's most commercially successful. Over 11,000 lines, she addressed many Victorian social issues, including reform, illegitimacy, the pressure to marry and what women must overcome to be independent, successful writers, in a world dominated by men. With Margaret Reynolds Professor of English at Queen Mary, University of LondonDaniel Karlin Winterstoke Professor of English Literature at the University of BristolAndKaren O'Brien Professor of English Literature at King's College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the early years of Bedlam, the name commonly used for the London hospital of St Mary of Bethlehem outside Bishopsgate, described in 1450 by the Lord Mayor of London as a place where may "be found many men that be fallen out of their wit. And full honestly they be kept in that place; and some be restored onto their wit and health again. And some be abiding therein for ever." As Bethlem, or Bedlam, it became a tourist attraction in the 17th Century at its new site in Moorfields and, for its relatively small size, made a significant impression on public attitudes to mental illness. The illustration, above, is from the eighth and final part of Hogarth's 'A Rake's Progress' (1732-3), where Bedlam is the last stage in the decline and fall of a young spendthrift,Tom Rakewell.With Hilary Marland Professor of History at the University of WarwickJustin Champion Professor of the History of Early Modern Ideas at Royal Holloway, University of London and President of the Historical Associati

Melvyn Bragg and guests discuss the Maya Civilization, developed by the Maya people, which flourished in central America from around 250 AD in great cities such as Chichen Itza and Uxmal with advances in mathematics, architecture and astronomy. Long before the Spanish Conquest in the 16th Century, major cities had been abandoned for reasons unknown, although there are many theories including overpopulation and changing climate. The hundreds of Maya sites across Belize, El Salvador, Guatemala, Honduras and Mexico raise intriguing questions about one of the world's great pre-industrial civilizations.WithElizabeth Graham Professor of Mesoamerican Archaeology at University College LondonMatthew Restall Edwin Erle Sparks Professor of Latin American History and Anthropology at Pennsylvania State UniversityAndBenjamin Vis Eastern ARC Research Fellow in Digital Humanities at the University of KentProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the Vereenigde Oost-Indische Compagnie or VOC, known in English as the Dutch East India Company. The VOC dominated the spice trade between Asia and Europe for two hundred years, with the British East India Company a distant second. At its peak, the VOC had a virtual monopoly on nutmeg, mace, cloves and cinnamon, displacing the Portuguese and excluding the British, and were the only European traders allowed access to Japan.With Anne Goldgar Reader in Early Modern European History at King's College LondonChris Nierstrasz Lecturer in Global History at Erasmus University, Rotterdam, formerly at the University of WarwickAndHelen Paul Lecturer in Economics and Economic History at the University of SouthamptonProducer: Simon Tillotson.

Mary Magdalene is one of the best-known figures in the Bible and has been a frequent inspiration to artists and writers over the last 2000 years. According to the New Testament, she was at the foot of the cross when Jesus was crucified and was one of the first people to see Jesus after the resurrection. However, her identity has provoked a large amount of debate and in the Western Church she soon became conflated with two other figures mentioned in the Bible, a repentant sinner and Mary of Bethany. Texts discovered in the mid-20th century provoked controversy and raised further questions about the nature of her relations with Jesus.With:Joanne Anderson Lecturer in Art History at the Warburg Institute, School of Advanced Study, University of LondonEamon Duffy Emeritus Professor of the History of Christianity at the University of Cambridge and Fellow of Magdalene CollegeJoan Taylor Professor of Christian Origins and Second Temple Judaism at King's College LondonProducer: Victoria Brignell.

Melvyn Bragg and guests discuss the life and work of Robert Hooke (1635-1703) who worked for Robert Boyle and was curator of experiments at the Royal Society. The engraving of a flea, above, is taken from his Micrographia which caused a sensation when published in 1665. Sometimes remembered for his disputes with Newton, he studied the planets with telescopes and snowflakes with microscopes. He was an early proposer of a theory of evolution, discovered light diffraction with a wave theory to explain it and felt he was rarely given due credit for his discoveries. WithDavid Wootton Anniversary Professor of History at the University of YorkPatricia Fara President Elect of the British Society for the History of ScienceAndRob Iliffe Professor of History of Science at Oxford UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the poetry of Rumi, the Persian scholar and Sufi mystic of the 13th Century. His great poetic works are the Masnavi or "spiritual couplets" and the Divan, a collection of thousands of lyric poems. He is closely connected with four modern countries: Afghanistan, as he was born in Balkh, from which he gains the name Balkhi; Uzbekistan from his time in Samarkand as a child; Iran as he wrote in Persian; and Turkey for his work in Konya, where he spent most of his working life and where his followers established the Mevlevi Order, also known as the Whirling Dervishes.With Alan Williams British Academy Wolfson Research Professor at the University of ManchesterCarole Hillenbrand Professor of Islamic History at the University of St Andrews and Professor Emerita of Edinburgh UniversityAnd Lloyd Ridgeon Reader in Islamic Studies at the University of GlasgowProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the origins, development and uses of chromatography. In its basic form, it is familiar to generations of schoolchildren who put a spot of ink at the bottom of a strip of paper, dip it in water and then watch the pigments spread upwards, revealing their separate colours. Chemists in the 19th Century started to find new ways to separate mixtures and their work was taken further by Mikhail Tsvet, a Russian-Italian scientist who is often credited with inventing chromatography in 1900. The technique has become so widely used, it is now an integral part of testing the quality of air and water, the levels of drugs in athletes, in forensics and in the preparation of pharmaceuticals.WithAndrea Sella Professor of Chemistry at University College LondonApryll Stalcup Professor of Chemical Sciences at Dublin City UniversityAndLeon Barron Senior Lecturer in Forensic Science at King's College London.

Melvyn Bragg and guests discuss the life, times and influence of Eleanor of Aquitaine (c1122-1204) who was one of the most powerful women in Twelfth Century Europe, possibly in the entire Middle Ages. She inherited land from the Loire down to the Pyrenees, about a third of modern France. She married first the King of France, Louis VII, joining him on the Second Crusade. She became stronger still after their marriage was annulled, as her next husband, Henry Plantagenet became Henry II of England. Two of their sons, Richard and John, became kings and she ruled for them when they were abroad. By her death in her eighties, Eleanor had children and grandchildren in power across western Europe. This led to competing claims of inheritance and, for much of the next 250 years, the Plantagenet and French kings battled over Eleanor's land.WithLindy Grant Professor of Medieval History at the University of ReadingNicholas Vincent Professor of Medieval History at the University of East AngliaAndJulie Barrau University Lect

Melvyn Bragg and guests discuss Thomas Paine and his pamphlet "Common Sense" which was published in Philadelphia in January 1776 and promoted the argument for American independence from Britain. Addressed to The Inhabitants of America, it sold one hundred and fifty thousand copies in the first few months and is said, proportionately, to be the best-selling book in American history. Paine had arrived from England barely a year before. He vigorously attacked monarchy generally and George the Third in particular. He argued the colonies should abandon all hope of resolving their dispute with Britain and declare independence immediately. Many Americans were scandalised. More were inspired and, for Paine's vision of America's independent future, he has been called a Founding Father of the United States.With Kathleen Burk Professor Emerita of Modern and Contemporary History at University College LondonNicholas Guyatt University Lecturer in American History at the University of CambridgeAndPeter Thompson Associate Pr

Melvyn Bragg and guests discuss the planet Saturn with its rings of ice and rock and over 60 moons. In 1610, Galileo used an early telescope to observe Saturn, one of the brightest points in the night sky, but could not make sense of what he saw: perhaps two large moons on either side. When he looked a few years later, those supposed moons had disappeared. It was another forty years before Dutch scientist Christiaan Huygens solved the mystery, realizing the moons were really a system of rings. Successive astronomers added more detail, with the greatest leaps forward in the last forty years. The Pioneer 11 spacecraft and two Voyager missions have flown by, sending back the first close-up images, and Cassini is still there, in orbit, confirming Saturn, with its rings and many moons, as one of the most intriguing and beautiful planets in our Solar System. WithCarolin Crawford Public Astronomer at the Institute of Astronomy and Fellow of Emmanuel College, University of CambridgeMichele Dougherty Professor of Spac

Melvyn Bragg and guests discuss Tristan and Iseult, one of the most popular stories of the Middle Ages. From roots in Celtic myth, it passed into written form in Britain a century after the Norman Conquest and almost immediately spread throughout northern Europe. It tells of a Cornish knight and an Irish queen, Tristan and Iseult, who accidentally drink a love potion, at the same time, on the same boat, travelling to Cornwall. She is due to marry Tristan's king, Mark. Tristan and Iseult seemed ideally matched and their love was heroic, but could that excuse their adultery, in the minds of medieval listeners, particularly when the Church was so clear they were wrong?WithLaura Ashe Associate Professor of English at Worcester College, University of OxfordJuliette Wood Associate Lecturer in the School of Welsh at Cardiff UniversityAndMark Chinca Reader in Medieval German Literature at the University of CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the eminent 19th-century scientist Michael Faraday. Born into a poor working-class family, he received little formal schooling but became interested in science while working as a bookbinder's apprentice. He is celebrated today for carrying out pioneering research into the relationship between electricity and magnetism. Faraday showed that if a wire was turned in the presence of a magnet or a magnet was turned in relation to a wire, an electric current was generated. This ground-breaking discovery led to the development of the electric generator and ultimately to modern power stations. During his life he became the most famous scientist in Britain and he played a key role in founding the Royal Institution's Christmas lectures which continue today.With:Geoffrey Cantor Professor Emeritus of the History of Science at the University of LeedsLaura Herz Professor of Physics at the University of OxfordFrank James Professor of the History of Science at the Royal InstitutionProducer: Vic

Melvyn Bragg and his guests discuss the evolution and role of Circadian Rhythms, the so-called body clock that influences an organism's daily cycle of physical, behavioural and mental changes. The rhythms are generated within organisms and also in response to external stimuli, mainly light and darkness. They are found throughout the living world, from bacteria to plants, fungi to animals and, in humans, are noticed most clearly in sleep patterns. WithRussell Foster Professor of Circadian Neuroscience at the University of OxfordDebra Skene Professor of Neuroendocrinology at the University of SurreyAndSteve Jones Emeritus Professor of Genetics at University College London.

Melvyn Bragg and guests discuss the origins and rise of Legalism in China, from the start of the Warring States Period (c475 - 221 BC) to the time of The First Emperor Qin Shi Huang (pictured), down to Chairman Mao and the present day. Advanced by the Qin statesman Shang Yang and later blended together by Han Fei, the three main aspects of Legalism were the firm implementation of laws, use of techniques such as responsibility and inscrutability, and taking advantage of the ruler's position. The Han dynasty that replaced the Qin discredited this philosophy for its apparent authoritarianism, but its influence continued, re-emerging throughout Chinese history.WithFrances Wood Former Curator of the Chinese Collections at the British LibraryHilde de Weerdt Professor of Chinese History at Leiden UniversityAndRoel Sterckx Joseph Needham Professor of Chinese History at the University of Cambridge.Producer: Simon Tillotson.

Melvyn Bragg and guests discuss the scientific advances made in the three voyages of Captain James Cook, from 1768 to 1779. Cook's voyages astonished Europeans, bringing back detailed knowledge of the Pacific and its people, from the Antarctic to the Bering Straits. This topic is one of more than a thousand different ideas suggested by listeners in October and came from Alysoun Hodges in the UK, Fiachra O'Brolchain in Ireland, Mhairi Mackay in New Zealand, Enzo Vozzo in Australia, Jeff Radford in British Columbia and Mark Green in Alaska. With Simon Schaffer Professor of the History of Science at the University of CambridgeRebekah Higgitt Lecturer in the History of Science at the University of KentAndSophie Forgan Retired Principle Lecturer at the University of Teesside Chairman of Trustees of the Captain Cook Museum, WhitbyProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the outbreak of witch trials in Massachusetts in 1692-3, centred on Salem, which led to the execution of twenty people, with more dying in prison before or after trial. Some were men, including Giles Corey who died after being pressed with heavy rocks, but the majority were women. At its peak, around 150 people were suspected of witchcraft, including the wife of the governor who had established the trials. Many of the claims of witchcraft arose from personal rivalries in an area known for unrest, but were examined and upheld by the courts at a time of mass hysteria, belief in the devil, fear of attack by Native Americans and religious divisions.With Susan Castillo-Street Harriet Beecher Stowe Professor Emerita of American Studies at King's College LondonSimon Middleton Senior Lecturer in American History at the University of SheffieldAnd Marion Gibson Professor of Renaissance and Magical Literatures at Exeter University, Penryn Campus.Producer: Simon Tillotson.