In Our Time Folgen

Melvyn Bragg and guests discuss the history of optics. From telescopes to microscopes, from star-gazing to the intimacies of a magnified flea. As Galileo turned his telescope to the heavens in the early 1600s, Kepler began to formulate a theory of optics. The new and improving instruments went hand in hand with radical new ideas about how we see and what we see. Spectacles allowed scholars to study long into the evening (and into old age), while giant telescopes, up to 100 feet long, led to the discovery of planets and attempts to map the universe. The craze for optical trickery swept Europe with enthusiastic amateurs often providing valuable discoveries. But this new view of the world through a lens raised questions too – how much can you rely on the senses, on what you see? The further into space you can spy, the larger and more unmanageable the universe becomes. At the same time, the microscope was utterly transforming the world close at hand.So how did these developments inform ideas of knowledge? If new methods of scientific observation support an empirical approach, what does this mean for divine, innate reason?With Simon Schaffer, Professor in History and Philosophy of Science at the University of Cambridge; Jim Bennett, Director of the Museum of the History of Science and Fellow of Linacre College at the University of Oxford; Emily Winterburn, Curator of Astronomy at the National Maritime Museum

Melvyn Bragg will be discussing Joseph Conrad’s Heart of Darkness. Written in 1899, Heart of Darkness is a fascinating fin de siecle critique of colonialism and man's greed. Conrad draws on his own adventures for the plot. The story's main narrator is Marlow, a merchant seaman who pilots a steamship upriver in what is largely assumed to be the Belgian Congo. He finds the scramble for Africa well underway, with Europeans desperately competing to make their fortunes from ivory. Marlow's journey takes him into the interior of this mysterious silent continent. After a dangerous passage he finally arrives at the company's most remote trading station. It is reigned over by Kurtz, a white man who seems to have become a kind of God figure to the local people. Marlow is fascinated by him, preferring his messianic ravings to the petty treachery and mercenarism of the other white traders. On the journey back, Kurtz dies, whispering “the horror, the horror”.The interpretation of these words has perplexed readers ever since and the book has prompted a diverse range of readings from the psychoanalytical, that sees the novella as a metaphor for the journey into the subconscious, to feminist readings that examine how Conrad excludes female characters and focuses on the male consciousness. Conrad wrote; “My task is, above all, to make you see”. So did he intend this novella to provoke a discussion of the immorality and rapacity at the centre of colonialism? Was he questioning the hero's welcome given to those famous explorers who came back from “civilising” Africa, as they saw it? Or was he, as the Nigerian writer Chinua Achebe put it, “guilty of preposterous and perverse arrogance in reducing Africa to the role of props for the break-up of one petty European mind?” With Susan Jones, Fellow and Tutor in English at St Hilda's College, Oxford; Robert Hampson, Professor of Modern Literature at Royal Holloway, University of London; Laurence Davies, Honorary Senior Research Fellow in English at Glasgow University and Visiting Professor of Comparative Literature at Dartmouth College, New Hampshire

Melvyn Bragg and guests discuss one of the most important philosophers of the 20th century, Karl Popper whose ideas about science and politics robustly challenged the accepted ideas of the day. He strongly resisted the prevailing empiricist consensus that scientists' theories could be proved true.Popper wrote: “The more we learn about the world and the deeper our learning, the more conscious, specific and articulate will be our knowledge of what we do not know, our knowledge of our ignorance”. He believed that even when a scientific principle had been successfully and repeatedly tested, it was not necessarily true. Instead it had simply not proved false, yet! This became known as the theory of falsification.He called for a clear demarcation between good science, in which theories are constantly challenged, and what he called “pseudo sciences” which couldn't be tested. His debunking of such ideologies led some to describe him as the “murderer of Freud and Marx”. He went on to apply his ideas to politics, advocating an Open Society. His ideas influenced a wide range of politicians, from those close to Margaret Thatcher, to thinkers in the Eastern Communist bloc and South America.So how did Karl Popper change our approach to the philosophy of science? How have scientists and philosophers made use of his ideas? And how are his theories viewed today? Are we any closer to proving scientific principles are “true”?With John Worrall, Professor of Philosophy of Science at the London School of Economics; Anthony O'Hear, Weston Professor of Philosophy at Buckingham University; Nancy Cartwright, Professor of Philosophy at the LSE and the University of California