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BBC Radio 4

In Our Time: Science

Melvyn Bragg and guests discuss the 2000-year-old device which transformed our understanding of astronomy in ancient Greece. In 1900 a group of sponge divers found the wreck of a ship off the coast of the Greek island of Antikythera. Among the items salvaged was a corroded bronze object, the purpose of which was not at first clear. It turned out to be one of the most important discoveries in marine archaeology. Over time, researchers worked out that it was some kind of astronomical analogue computer, the only one to survive from this period as bronze objects were so often melted down for other uses. In recent decades, detailed examination of the Antikythera Mechanism using the latest scientific techniques indicates that it is a particularly intricate tool for showing the positions of planets, the sun and moon, with a complexity and precision not surpassed for over a thousand years.

With 

Mike Edmunds 
Emeritus Professor of Astrophysics at Cardiff University

Jo Marchant 
Science journalist and author of 'Decoding the Heavens' on the Antikythera Mechanism

And 

Liba Taub 
Professor Emerita in the Department of History and Philosophy of Science at the University of Cambridge and Visiting Scholar at the Deutsches Museum, Munich

Producer: Simon Tillotson
In Our Time is a BBC Studios Audio Production

Reading list:

Derek de Solla Price, Gears from the Greeks: The Antikythera Mechanism (American Philosophical Society Press, 1974)

M. G. Edmunds, ‘The Antikythera mechanism and the mechanical universe’ (Contemp. Phys. 55, 2014) 

M.G. Edmunds, ’The Mechanical Universe’ (Astronomy & Geophysics, 64, 2023)

James Evans and J. Lennart Berggren, Geminos's Introduction to the Phenomena: A Translation and Study of a Hellenistic Survey of Astronomy (Princeton University Press, 2006)

T. Freeth et al., ‘Calendars with Olympiad display and eclipse prediction on the Antikythera mechanism’ (Nature 454, 2008)

Alexander Jones, A Portable Cosmos: Revealing the Antikythera Mechanism, Scientific Wonder of the Ancient World (Oxford University Press, 2017)

Jo Marchant, Decoding the Heavens: Solving the Mystery of the World’s First Computer (Windmill Books, 2009)

J.H. Seiradakis and M.G. Edmunds, ‘Our current knowledge of the Antikythera Mechanism’ (Nature Astronomy 2, 2018)

Liba Taub, Ancient Greek and Roman Science: A Very Short Introduction (Oxford University Press, 2022)

The Antikythera Mechanism

Melvyn Bragg and guests discuss whether the mass of scientific understanding and knowledge we have accumulated has destroyed our sense of poetic wonder at the world. Has our sense of awe at how the world works obscured our desire to know why it works the way it does? With Richard Dawkins evolutionary biologist, reader in Zoology and Fellow of New College, Oxford, Charles Simonyi Chair of Public Understanding of Science, Oxford University and author of Unweaving The Rainbow: Science, Delusion and The Appetite For Wonder; Ian McEwan, novelist, and author of the Booker prize winning novel Amsterdam.

Science's Revelations

Melvyn Bragg and guests discuss how perceptions of science and the power of science have changed in the 20th century. Does scientific endeavour increasingly concern itself with doubt rather than certainty, and is it coming any closer to integrating with other disciplines - philosophy or the social sciences? How much does the scientific explanation of the world owe to a wish for coherent understanding we all have, rather than objective observation, and why are we alternately disapproving of, then obsessively over-enthusiastic about new scientific theories? How far has specialisation in the sciences obscured our view of the world in its entirety, and if scientists want to operate within a social framework, can they do so and still claim to be objective and value-free in their findings?With John Gribbin, Visiting Fellow in Astronomy, University of Sussex and consultant to New Scientist; Mary Midgley, moral philosopher and former Senior Lecturer in Philosophy, University of Newcastle.

Science in the 20th century

Melvyn Bragg and guests discuss how our increased knowledge of the functioning of the brain and the mechanisms of memory in the 20th century has changed our feelings about our own natures, and our approach to the behaviour and treatment of others.Many questions have been thrown up this century by our growing knowledge about how the brain and the mind function. How easy is it to establish the relationship between the two, and what light can this relationship throw on our understanding of our own and others natures? With Steven Rose, Professor of Biology and Director of the Brain and Behaviour Research Group, Open University, Dan Robinson, Distinguished Research Professor, Georgetown University and visiting lecturer in Philosophy and Senior Member of Linacre College, Oxford University.

The Brain and Consciousness

Melvyn Bragg and guests marvel at our brains and discuss how at the end of a century of research we still understand so little about how they work.Developments in the understanding of the brain represent one of the major leaps forward in science in the 20th century, and the research is gathering pace and intensity. It’s a subject which captures the imagination, particularly the search for consciousness whatever that might be, and brings together some of the newest technology and the oldest belief systems. What a piece of work is the brain - a grain-of-sand-sized piece contains one hundred thousand neurons, two-million axons and one billion synapses which all talk to each other. How far we have got with our understanding of the brain and what can it tell us about ourselves and the world we live in?With Professor Susan Greenfield, director of the Royal Institution, Professor of Pharmacology, Oxford University and Professor of Physics at Gresham College; Professor Vilayanur Ramachandran, Professor of Neuroscience and Psychology, Director of the Brain Perception Laboratory, University of California in San Diego and Professor at the Salk Institute.

Neuroscience in the 20th century

Melvyn Bragg and guests discuss the implications of the developments in genetic engineering. Out of the city of Cambridge in the mid century came DNA and out of Edinburgh at the end of the century came the cloning of Dolly the sheep. These two facts might well do more to change the world literally, and our view of the world, than anything else that has happened at any time. Genetics have become the conversation of our day and with the Human Genome Project lumbering towards completion, its power grows. But are the consequences likely to be destructive and will what we think of as a human being, a personality, or even a person, change uncomfortably and irredeemably? With Grahame Bulfield, geneticist, honorary professor, Edinburgh University and Director of the Roslin Institute, Edinburgh; Bryan Appleyard, features writer for The Sunday Times and author of Brave New Worlds: Genetics and the Human Experience.

Genetic Engineering

Melvyn Bragg and guests discuss ageing. In 1900, 1% of the world’s population were over 65. In the 1990s nearly 8% are. By the year 2020, nearly 1/5th of the world’s population will be over 65 - the figure rises to 25% in the UK. We are now living longer than at any time in our history. How much do economic factors, rather than biological factors, determine what ageing really means and our attitude to it? And what are the ethical, economic and biological implications of living longer?Tom Kirkwood, is an expert on the science of ageing and he brings to bear a close study of how the ageing process is being arrested and speculates on the very great age some of us could and will reach. He has said: “Today’s older people are the vanguard of an extraordinary revolution in longevity that is radically changing the structure of society and altering our perceptions of life and death. The price for this success - and make no mistake it is a success - is that we now face the challenge of ageing.”Alan Walker is an expert in the sociology of ageing and he takes in the whole context, especially the economic dimension. With Professor Alan Walker, social gerontologist, advisor to the UN’s programme on Ageing and has chaired the European Commission’s observatory on Ageing and Older People; Professor Tom Kirkwood, Britain’s first professor of Biological Gerontology, University of Manchester and President of the British Society for Research into Ageing.

Ageing

Melvyn Bragg and guests discuss the relevance of psychoanalysis at the end of the 20th century. It’s 100 years since Sigmund Freud, the founder of psychoanalysis, a term which he coined, published The Interpretation of Dreams. Sixty years after his death, Freud’s influence and the influence of that book, has been felt in the 20th century in everything from the arts, history and anthropology, to of course psychology and even science. Dreams have inspired political speeches, songs, and seduction, captivating and fascinating mankind since time immemorial. For Sigmund Freud, they were the key to unlocking the working of the unconscious. But at the end of the 20th century, has psychoanalysis become too fractured and too insistent on privileging the past over the present to go forward into the future? Has it failed to develop and adapt to an age increasingly dominated by science? With Dr Juliet Mitchell, psychoanalyst, Fellow of Jesus College, Cambridge, Department of Political and Social Sciences; Adam Phillips, psychoanalyst and author of The Beast in the Nursery.

Psychoanalysis and its Legacy

Melvyn Bragg and guests discuss the history of our ideas about the formation of language. The psychologist George Miller worked out that in English there are potentially a hundred million trillion sentences of twenty words in length - that’s a hundred times the number of seconds since the birth of the universe. “Language”, as Chomsky put it, “makes infinite use of finite media”. “Language”, as Steven Pinker puts it, “comes so naturally to us that it’s easy to forget what a strange and miraculous gift it is”. “All over the world”, he writes, “members of our species spend a good part of their lives fashioning their breath into hisses and hums and squeaks and pops and are listening to others do the same”. Jean Jacques Rousseau once said that we differ from the animal kingdom in two main ways - the use of language and the prohibition of incest. Language and our ability to learn it has been held up traditionally as our species’ most remarkable achievement, marking us apart from the animals. But in the 20th century, our ideas about how language is formed are being radically challenged and altered. With Dr Jonathan Miller, medical doctor, performer, broadcaster, author and film and opera director; Steven Pinker, cognitive scientist, Professor of Psychology and Director of the Centre for Neuroscience, Massachusetts Institute of Technology, California.

Language and the Mind

Melvyn Bragg and guests discuss the history of thought about space, and examines whether cyberspace has introduced a new concept of space in our world or if its roots are in Einsteinian physics. It would have seemed extraordinary to Dante or Newton, from their different perspectives, that at the end of the 20th century there would be learned scholars who would find no place for religion in the great schemes of thought and belief. In the 20th century our notions of physical space have been revolutionised. Einstein said that space was not a separate entity; we’ve probed and explored the outer reaches of our physical space with space flight, powerful telescopes and theoretical physics. But in the last 20 years, with the birth of the Internet, a virtual form of space has been introduced to us - cyberspace - where people can meet and communicate ideas; you sit at home, punch the keys and you can rove all over the world - the keyboard becomes a magic carpet. But does cyberspace introduce a new concept of space in our world? Or does it really have its roots in Einsteinian physics and even in Medieval theologyAccording to the science writer Margaret Wertheim, cyberspace - life on the surfing internet - gives us not only virtual reality, but a soul. Dr John Polkinghorne, the distinguished physicist and ordained priest in the C of E, is not happy with this news, but he does believe that religion is not destroyed by the new technology, and that latest theories in physics reinforce it. With The Reverend Dr John Polkinghorne, Fellow of Queen’s College, Cambridge and Canon Theologian of Liverpool; Margaret Wertheim, science writer and author of The Pearly Gates of Cyberspace: A History of Space from Dante to the Internet.

Space in Religion and Science

Melvyn Bragg and guests discuss the problems of consciousness, one of the greatest mysteries facing science and philosophy today. The frustrations, the stubborn facts and the curiosities of today’s thinkers, philosophers, physicists and psychologists, demonstrate the elusiveness, and the utter impenetrability of consciousness. Can we explain our perception of colour, smell or what it is like to be in love in purely physical terms? Can memory, conviction and reason be explained primarily in terms of neural firing sequences in the brain? Three centuries ago Descartes famously believed that the problem was best solved by being ignored. Was he right? Could it be that the human mind is just not built to understand its own basis?With Ted Honderich, philosopher and former Grote Professor of the Philosophy of Mind and Logic, University College, London; Sir Roger Penrose eminent physicist, mathematician and author of The Large, The Small, and the Human Mind.

Consciousness

Consciousness

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