Melvyn Bragg and guests discuss the discovery made in 1911 by the Dutch physicist Heike Kamerlingh Onnes (1853-1926). He came to call it Superconductivity and it is a set of physical properties that nobody predicted and that none, since, have fully explained. When he lowered the temperature of mercury close to absolute zero and ran an electrical current through it, Kamerlingh Onnes found not that it had low resistance but that it had no resistance. Later, in addition, it was noticed that a superconductor expels its magnetic field. In the century or more that has followed, superconductors have already been used to make MRI scanners and to speed particles through the Large Hadron Collider and they may perhaps bring nuclear fusion a little closer (a step that could be world changing).The image above is from a photograph taken by Stephen Blundell of a piece of superconductor levitating above a magnet.With Nigel Hussey
Professor of Experimental Condensed Matter Physics at the University of Bristol and Radbout UniversitySuchitra Sebastian
Professor of Physics at the Cavendish Laboratory at the University of CambridgeAndStephen Blundell
Professor of Physics at the University of Oxford and Fellow of Mansfield CollegeProducer: Simon Tillotson
Kultur & GesellschaftPolitikWirtschaftReligiösTalk
In Our Time With Melvyn Bragg Folgen
Melvyn Bragg and his guests discuss the history of ideas - including topics drawn from philosophy, science, history, religion and culture.
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Folge vom 23.02.2023Superconductivity
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Folge vom 16.02.2023Rawls' Theory of JusticeMelvyn Bragg and guests discuss A Theory of Justice by John Rawls (1921 - 2002) which has been called the most influential book in twentieth century political philosophy. It was first published in 1971. Rawls (pictured above) drew on his own experience in WW2 and saw the chance in its aftermath to build a new society, one founded on personal liberty and fair equality of opportunity. While in that just society there could be inequalities, Rawls’ radical idea was that those inequalities must be to the greatest advantage not to the richest but to the worst off. WithFabienne Peter Professor of Philosophy at the University of WarwickMartin O’Neill Professor of Political Philosophy at the University of YorkAnd Jonathan Wolff The Alfred Landecker Professor of Values and Public Policy at the Blavatnik School of Government, University of Oxford and Fellow of Wolfson CollegeProducer: Simon Tillotson
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Folge vom 09.02.2023John DonneMelvyn Bragg and guests discuss Donne (1573-1631), known now as one of England’s finest poets of love and notable in his own time as an astonishing preacher. He was born a Catholic in a Protestant country and, when he married Anne More without her father's knowledge, Donne lost his job in the government circle and fell into a poverty that only ended once he became a priest in the Church of England. As Dean of St Paul’s Cathedral, his sermons were celebrated, perhaps none more than his final one in 1631 when he was plainly in his dying days, as if preaching at his own funeral.The image above is from a miniature in the Royal Collection and was painted in 1616 by Isaac Oliver (1565-1617)With Mary Ann Lund Associate Professor in Renaissance English Literature at the University of LeicesterSue Wiseman Professor of Seventeenth Century Literature at Birkbeck, University of LondonAnd Hugh Adlington Professor of English Literature at the University of Birmingham
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Folge vom 26.01.2023The Great StinkMelvyn Bragg and guests discuss the stench from the River Thames in the hot summer of 1858 and how it appalled and terrified Londoners living and working beside it, including those in the new Houses of Parliament which were still under construction. There had been an outbreak of cholera a few years before in which tens of thousands had died, and a popular theory held that foul smells were linked to diseases. The source of the problem was that London's sewage, once carted off to fertilise fields had recently, thanks to the modern flushing systems, started to flow into the river and, thanks to the ebb and flow of the tides, was staying there and warming in the summer sun. The engineer Joseph Bazalgette was given the task to build huge new sewers to intercept the waste, a vast network, so changing the look of London and helping ensure there were no further cholera outbreaks from contaminated water.The image above is from Punch, July 10th 1858 and it has this caption: The 'Silent Highway'-Man. "Your Money or your Life!"WithRosemary Ashton Emeritus Quain Professor of English Language and Literature at University College LondonStephen Halliday Author of ‘The Great Stink of London: Sir Joseph Bazalgette and the Cleansing of the Victorian Metropolis’AndPaul Dobraszczyk Lecturer at the Bartlett School of Architecture at University College London