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Lyt når som helst, hvor som helst 

BBC Radio 4

A world-class seminar, every week.
 
In Our Time explores the ideas, people and discoveries that have shaped our world, spanning history, philosophy, religion, science, literature, art and culture.
 
On Thursdays, hear brand-new episodes hosted by Misha Glenny and leading academics. On Mondays, discover Misha's Archive Picks: classic conversations from the In Our Time archive, originally presented by Melvyn Bragg.
 
Recent episodes have featured topics as wide-ranging as the Roman Arena, Handel's Messiah, John Keats, On Liberty and the Mariana Trench, bringing expert insight to pivotal events, influential thinkers and remarkable discoveries.
 
Throughout the archive, you can hear discussions on historical figures such as Marie Antoinette, Nefertiti, Mary Wollstonecraft, Karl Marx and Albert Einstein; explore great works of literature such as Shakespeare’s Hamlet, Nineteen Eighty-Four, Alice's Adventures in Wonderland and the poetry of John Donne; uncover the stories behind cultural masterpieces including Van Gogh's Sunflowers and Michelangelo's Sistine Chapel; or journey from Jupiter and the death of stars, to the theories of Plato and Aristotle. 
 
In Our Time celebrates the pursuit of knowledge and the enduring power of ideas.

In Our Time

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His eighth choice is The War of 1812, which was first released in January 2013. Melvyn Bragg and his guests discussed the conflict between America and the British Empire sometimes referred to as the second American War of Independence. In June 1812, President James Madison declared war on Britain, angered by the restrictions Britain had imposed on American trade, the Royal Navy's capture of American sailors and British support for Native Americans. After three years of largely inconclusive fighting, the conflict finally came to an end with the Treaty of Ghent which, among other things, helped to hasten the abolition of the global slave trade.
 
Although the War of 1812 is often overlooked, historians say it had a profound effect on the USA and Canada's sense of national identity, confirming the USA as an independent country. America's national anthem, The Star-Spangled Banner began life as a poem written after its author, Francis Scott Key, witnessed the British bombardment of Fort McHenry during the Battle of Baltimore. The war also led to Native Americans losing hundreds of thousands of acres of land in a programme of forced removal.
 
With:
 
Kathleen Burk
Professor of Modern and Contemporary History at University College London
 
Lawrence Goldman
Fellow in Modern History at St Peter's College, University of Oxford
 
Frank Cogliano
Professor of American History at the University of Edinburgh
 
Producer: Victoria Brignell

Reading list:

Carl Benn, The War of 1812 (Osprey, 2002)

George Robert Gleig, A Narrative of the Campaigns of the British Army: at Washington, Baltimore, and New Orleans by an officer (John Murray, 1821)

Donald R. Hickey, The War of 1812: A Forgotten Conflict (University of Illinois Press, 1989)

Reginald Horsman, The Causes of the War of 1812 (Various publishers, 1962)

Reginald Horsman, The Diplomacy of the New Republic, 1776-1815 (Harlan Davidson, 1985)

Lawrence Kaplan, Entangling Alliances with None: American Foreign Policy in the Age of Jefferson (Kent State University Press, 1987)

Andrew Lambert, The Challenge: Britain Against America in the Naval War of 1812 (Faber and Faber, 2012)

Jon Latimer, 1812: War with America (Harvard University Press, 2007)

Bradford Perkins, The Creation of a Republican Empire, 1776-1865 (Cambridge University Press, 1993)

Leonard Sadosky, Revolutionary Negotiations: Indians, Empires, and Diplomats in the Founding of America (University of Virginia Press, 2009)

J. C. A. Stagg, The War of 1812: Conflict for a Continent (Cambridge University Press, 2012)

Alan Taylor, The Civil War of 1812: American Citizens, British Subjects, Irish Rebels and Indian Allies (Knopf, 2010)

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: The War of 1812

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His sixth choice is Plato's Republic, an episode first released in June 2017. Is it always better to be just than unjust? That is the central question of Plato's Republic, written in c380BC. Plato applied this question both to the individual and the city-state, considering earlier and current forms of government in Athens and potential forms, in which the ideal city might be ruled by philosophers. The Republic is arguably Plato's best known and greatest work, a dialogue between Socrates and his companions, featuring the allegory of the cave and ideas about immortality of the soul, the value of poetry to society, and democracy's vulnerability to a clever demagogue seeking tyranny.

With

Angie Hobbs
Professor of the Public Understanding of Philosophy at the University of Sheffield

MM McCabe
Professor of Ancient Philosophy Emerita at King's College London

and

James Warren
Fellow of Corpus Christi College and a Reader in Ancient Philosophy at the University of Cambridge

Producer: Simon Tillotson

Reading list:

Julia Annas, An Introduction to Plato's Republic (Oxford University Press, 1998)

Rachel Barney, Tad Brennan and Charles Brittain, Plato and the Divided Self (Cambridge University Press, 2012)

G. R. F. Ferrari (ed.), The Cambridge Companion to Plato's Republic (Cambridge University Press, 2007)

Angela Hobbs, Plato and the Hero: Courage, Manliness and the Impersonal Good (Cambridge University Press, 2000)

Angela Hobbs, Plato's Republic (Ladybird Expert Book, to be published 2018)

Thomas More (trans. Dominic Baker-Smith), Utopia 1516 (Penguin, 2012)

Grethe B. Peterson (ed.), The Tanner Lectures on Human Values: 18 (University of Utah Press, 1997), especially ‘Culture and Society in Plato’s Republic’ by Myles Burnyeat

Gerald A. Press (ed.), The Continuum Companion to Plato (Bloomsbury, 2012)

Gerasimos Santas (ed.), The Blackwell Guide to Plato's Republic (Wiley-Blackwell, 2006)

Malcolm Schofield, Plato (Oxford University Press, 2006)

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Plato's Republic

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His seventh choice is the pioneering scientist Rosalind Franklin (1920 - 1958), first released in February 2018. During her distinguished career, Franklin carried out ground-breaking research into coal and viruses but she is perhaps best remembered for her investigations in the field of DNA. In 1952 her research generated a famous image that became known as Photograph 51. When the Cambridge scientists Francis Crick and James Watson saw this image, it enabled them the following year to work out that DNA has a double-helix structure, one of the most important discoveries of modern science. Watson, Crick and Franklin's colleague Maurice Wilkins received a Nobel Prize in 1962 for this achievement but Franklin did not and today many people believe that Franklin has not received enough recognition for her work. 

With:

Patricia Fara
President of the British Society for the History of Science

Jim Naismith
Interim lead of the Rosalind Franklin Institute, Director of the Research Complex at Harwell and Professor at the University of Oxford

Judith Howard
Professor of Chemistry at Durham University

Producer: Victoria Brignell.

Reading list:

Jenifer Glynn, My Sister Rosalind Franklin (Oxford University Press, 2012)

Kersten T. Hall, The Man in the Monkeynut Coat: William Astbury and the Forgotten Road to the Double-Helix (Oxford University Press, 2014)

Brenda Maddox, Rosalind Franklin: The Dark Lady of DNA (HarperCollins, 2002)

Anne Sayre, Rosalind Franklin and DNA (first published 1975; W. W. Norton, 2000)

James D. Watson, The Double Helix: A Personal Account of the Discovery of the Structure of DNA (first published 1968; W&N, 2010)

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Rosalind Franklin

In Our Time returns for a new series with host Misha Glenny.

A world class seminar, every week. In Our Time explores the ideas, people and discoveries that have shaped our world, spanning history, philosophy, religion, science, literature, art and culture. 
 
On Thursdays, hear brand-new episodes with Misha Glenny and leading academics. On Mondays, discover Misha's Archive Picks: classic conversations from the In Our Time archive, originally presented by Melvyn Bragg.
 
Recent episodes have featured topics as wide-ranging as the Roman Arena, Handel's Messiah, John Keats, On Liberty and the Mariana Trench, bringing expert insight to pivotal events, influential thinkers and remarkable discoveries.
 
Throughout the archive, you can hear discussions on historical figures such as Marie Antoinette, Nefertiti, Mary Wollstonecraft, Karl Marx and Albert Einstein; explore great works of literature such as Shakespeare’s Hamlet, Nineteen Eighty-Four, Alice's Adventures in Wonderland and the poetry of John Donne; uncover the stories behind cultural masterpieces including Van Gogh's Sunflowers and Michelangelo's Sistine Chapel; or journey from Jupiter and the death of stars, to the theories of Plato and Aristotle.
 
In Our Time celebrates the pursuit of knowledge and the enduring power of ideas.

A BBC Studios Production.

In Our Time Returns for a New Series

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fifth choice, first released in May 2024, is the Empress Dowager Cixi, the woman who, for almost fifty years, was the most powerful figure in the Chinese court. Cixi (1835-1908) started out at court as one of the Emperor's many concubines, yet was the only one who gave him a son to succeed him and who also possessed great political skill and ambition. When their son became emperor he was still a young child and Cixi ruled first through him and then, following his death, through another child emperor. This was a time of rapid change in China, when western powers and Japan humiliated the forces of the Qing empire time after time, and Cixi had the chance to push forward the modernising reforms the country needed to thrive. However, when she found those reforms conflicted with her own interests or those of the Qing dynasty, she was arguably obstructive or too slow to act and she has been personally blamed for some of those many humiliations even when the fault lay elsewhere.

With

Yangwen Zheng
Professor of Chinese History at the University of Manchester

Rana Mitter
The S.T. Lee Professor of US-Asia Relations at the Harvard Kennedy School

And

Ronald Po
Associate Professor in the Department of International History at London School of Economics and Visiting Professor at Leiden University

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

Reading list:

Pearl S. Buck, Imperial Woman: The Story of the Last Empress of China (first published 1956; Open Road Media, 2013)

Katharine A. Carl, With the Empress Dowager (first published 1906; General Books LLC, 2009)

Jung Chang, Empress Dowager Cixi: The Concubine Who Launched Modern China (Jonathan Cape, 2013)

Princess Der Ling, Old Buddha (first published 1929; Kessinger Publishing, 2007)

Joseph W. Esherick, The Origins of the Boxer Uprising (University of California Press, 1987)

John K. Fairbank and Merle Goldman, China: A New History (Harvard University Press, 2006)

Peter Gue Zarrow and Rebecca Karl (eds.), Rethinking the 1898 Reform Period: Political and Cultural Change in Late Qing China (Harvard University Press, 2002)

Grant Hayter-Menzies, Imperial Masquerade: The Legend of Princess Der Ling (Hong Kong University Press, 2008)

Keith Laidler, The Last Empress: The She-Dragon of China (Wiley, 2003)

Keith McMahon, Celestial Women: Imperial Wives and Concubines in China from Song to Qing (Rowman & Littlefield, 2020)

Anchee Min, The Last Empress (Bloomsbury, 2011)

Ying-Chen Peng, Artful Subversion: Empress Dowager Cixi’s Image Making (Yale University Press, 2023).

Sarah Pike Conger, Letters from China: with Particular Reference to the Empress Dowager and the Women of China (first published 1910; Forgotten Books, 2024)

Stephen Platt, Imperial Twilight: The Opium War and the End of China's Last Golden Age (Atlantic Books, 2019)

Liang Qichao (trans. Peter Zarrow), Thoughts From the Ice-Drinker's Studio: Essays on China and the World (Penguin Classics, 2023)

Sterling Seagrave, Dragon Lady: The Life and Legend of the Last Empress of China (Vintage, 1993)

Jonathan D. Spence, The Search for Modern China (first published 1991; W. W. Norton & Company, 2001)

X. L. Woo, Empress Dowager Cixi: China's Last Dynasty and the Long Reign of a Formidable Concubine (Algora Publishing, 2003)

Archive: Empress Dowager Cixi

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fourth choice, first released in January 2008, explores how the science of plate tectonics revolutionised our understanding of the planet on which we live. America is getting further away from Europe. This is not a political statement but a geological fact. Just as the Pacific is getting smaller, the Red Sea bigger, the Himalayas are still going up and one day the Horn of Africa will be a large island. This is the theory of plate tectonics, a revolutionary idea in 20th century geology that claimed the continents of Earth were dancing to the music of deep time. A dance of incredible slowness, yet powerful enough to throw up the mountains and pour away the oceans. Plate tectonics, the idea that the earth’s surface moved on a carpet of molten magma, constituted a genuine scientific revolution in geology. It explained why mountains appeared and why earthquakes occurred; it explained the curious distribution of fossils across the globe and finally solved the age old conundrum of why continents such as Africa and South America appeared to fit together like a giant jigsaw puzzle. Plate tectonics has made geologists, and many more besides, profoundly re-think what the Earth was, how it worked and how it related to all the things in it. 

With:

Richard Corfield
Visiting Senior Lecturer in Earth Sciences at the Open University

Joe Cann
Senior Fellow in the School of Earth and Environment at the University of Leeds

Lynne Frostick
Director of the Hull Environment Research Institute and Professor of Physical Geography at the University of Hull

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Plate Tectonics

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His third choice, first released in November 2014, is the Egyptian pharaoh Hatshepsut, whose name means 'foremost of noble ladies'. She ruled Egypt from about 1479 - 1458 BC and some scholars argue that she was one of the most successful and influential pharaohs. When she came to the throne, Egypt was still recovering from a period of turbulence known as the Second Intermediate Period a few generations earlier. Hatshepsut reasserted Egyptian power by building up international trade and commissioned buildings considered masterpieces of Egyptian architecture. She also made significant changes to the ideology surrounding the pharaoh and the gods. However, following her death, her name was erased from the records and left out of ancient lists of Egyptian kings.

With:

Elizabeth Frood
Associate Professor of Egyptology at the University of Oxford

Kate Spence
Lecturer in Egyptian Archaeology at the University of Cambridge

Campbell Price
Curator of Egypt and Sudan at The Manchester Museum

Producer: Victoria Brignell

Reading list:

Elizabeth Blyth, Karnak: Evolution of a Temple (Routledge, 2006)

Kara Cooney, The Woman Who Would Be King (Crown, 2014)

José M. Galán, Betsy M. Bryan and Peter F. Dorman (eds.), Creativity and Innovation in the Reign of Hatshepsut (Oriental Institute of the University of Chicago, 2014)

Marc Van De Mieroop, A History of Ancient Egypt (Wiley-Blackwell, 2011)

Catharine H. Roehrig, Renée Dreyfus and Cathleen A. Keller, Hatshepsut: From Queen to Pharaoh (Yale University Press, 2005)

Catharine Roehrig (ed.), Hatshepsut: From Queen to Pharaoh (Metropolitan Museum of Art, 2005)

Joyce Tyldesley, Hatshepsut: The Female Pharaoh (Penguin, 1998)

Willeke Wendrich (ed.), UCLA Encyclopedia of Egyptology (University of California, 2010) particularly Peter Brand’s essay, ‘Usurpation of Monuments’

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Hatshepsut

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His second choice, first released in December 2019, is the history and social impact of coffee. From its origins in Ethiopia, coffea arabica spread through the Ottoman Empire before reaching Western Europe where, in the 17th century, coffee houses were becoming established. There, caffeinated customers stayed awake for longer and were more animated, and this helped to spread ideas and influence culture. Coffee became a colonial product, grown by slaves or indentured labour, with coffea robusta replacing arabica where disease had struck, and was traded extensively by the Dutch and French empires; by the 19th century, Brazil had developed into a major coffee producer, meeting demand in the USA that had grown on the waggon trails.

With

Judith Hawley
Professor of 18th Century Literature at Royal Holloway, University of London

Markman Ellis
Professor of 18th Century Studies at Queen Mary University of London

And

Jonathan Morris
Professor in Modern History at the University of Hertfordshire

Producer: Simon Tillotson

Reading list:

Brian Cowan, The Social Life of Coffee: The Emergence of the British Coffeehouse (Yale University Press, 2005)

Benoit Daviron and Stefano Ponte, The Coffee Paradox: Global Markets, Commodity Trade and the Elusive Promise of Development (Zed Books, 2005)

Markman Ellis, The Coffee House: A Cultural History (Orion, 2004)

Ralph Hattox, Coffee and Coffeehouses: The Origins of a Social Beverage in the Medieval Near East (University of Washington Press, 1985)

Jonathan Morris, Coffee: A Global History (Reaktion, 2018)

Mark Prendergast Uncommon Grounds: The History of Coffee and How It Transformed our World (Basic Books, 2010)

Claudia Roden, Coffee (Faber, 1977)

William Clarence Smith and Steven Topik (eds.), The Global Coffee Economy in Africa, Asia, and Latin America, 1500-1989 (Cambridge University Press, 2003)

William H. Ukers, All About Coffee (first published 1935; Martino Fine Books, 2011)

Anthony Wild, Black Gold: The Dark History of Coffee (Harper Perennial, 2010)

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Coffee

Widely regarded as the first professional woman writer in English literature, Aphra Behn (1640-1689) is best known for her plays and her novel Oroonoko, she's been an inspiration to countless writers across the ages.

This archive episode, first released in October 2017, was selected as part of a ten-episode series by Misha Glenny. In the episode, Melvyn Bragg and guests discuss the life and times of Behn, who made her name and her living as a playwright, poet and writer of fiction during the Restoration. Virginia Woolf wrote of her: 'All women together, ought to let flowers fall upon the grave of Aphra Behn... for it was she who earned them the right to speak their minds'. Behn may well have spent some of her early life in Surinam, the setting for her novel Oroonoko, and there are records of her working in the Netherlands as a spy for Charles II. She was loyal to the Stuart kings and refused to write a poem on the coronation of William of Orange. She was regarded as an important writer in her lifetime and inspired others to write but fell out of favour for two centuries after her death when her work was seen as too bawdy, the product of a disreputable age.

With 

Janet Todd

Former President of Lucy Cavendish College, Cambridge University

Ros Ballaster

Professor of 18th Century Literature at Mansfield College, University of Oxford

and

Claire Bowditch 

Post-doctoral Research Associate in English and Drama at Loughborough University 
 
Producer: Simon Tillotson. 
 
Reading list: 
 
Kate Aughterson, Aphra Behn: The Comedies (Palgrave Macmillan, 2003) 
 
Ros Ballaster, Seductive Forms: Women’s Amatory Fiction 1684-1740 (Oxford Clarendon Press, 1991) 
 
Aphra Behn (ed. Joanna Lipking), Oroonoko (Norton and Co, 1997) 
 
Aphra Behn (ed. Paul Salzman), Oroonoko and Other Writings (Oxford University Press, 2009) 
 
Aphra Behn (ed. Jane Spencer), The Rover and Other Plays (Oxford University Press, 2008) 
 
Aphra Behn (ed. Janet Todd), Oroonoko (Penguin Classics, 2003) 
 
Aphra Behn (ed. Janet Todd), Oroonoko, the Rover and Other Works (Penguin Classics, 1999) 
 
Aphra Behn (ed. Janet Todd), The Complete Works of Aphra Behn:7 vols. (Pickering and Chatto, 1992-6) 
 
Claire Bowditch, The Works of Aphra Behn (Cambridge University Press, forthcoming) 
 
W. J. Cameron, New Light on Aphra Behn (University of Auckland Press, 1961) 
 
Maureen Duffy, The Passionate Shepherdess: Aphra Behn, 1640-89 (Jonathan Cape, 1977) 
 
Derek Hughes, The Theatre of Aphra Behn (Palgrave Macmillan, 2001) 
 
Derek Hughes (ed.), Versions of Blackness: Oroonoko, Race and Slavery (Cambridge University Press, 2007) 
 
Jane Spencer, Aphra Behn’s Afterlife (Oxford University Press, 2000) 
 
Janet Todd (ed.), Aphra Behn Studies (Cambridge University Press, 1996) 
 
Janet Todd, Aphra Behn: A Secret Life (Fentum Press, 2017) 
 
Janet Todd and Derek Hughes (eds.), The Cambridge Companion to Aphra Behn (Cambridge University Press, 2004) 
 
S. J. Wiseman, Aphra Behn (Northcote House, 1996) 
 
In Our Time is a BBC Studios production 
 
Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Archive: Aphra Behn

Misha Glenny and guests discuss a familiar feature of our beaches: seashells, from their astonishing shapes and patterns that teach us about Earth’s oceans, to the ways that humans have treasured shells throughout history. Seashells appear in the mythologies of countless cultures across the world - think of Botticelli’s Venus emerging from a giant scallop shell, Vishnu's sacred horn panchajanya, or the Aztec god Quetzalcōātl’s talisman cut from a conch shell. The urge to collect shells seems to be as old as our species. We’ve used them as decoration, currency, and musical instruments. But shells aren’t just beautiful objects washed up on our beaches. Many belong to one of the most diverse groups of the animal kingdom, Mollusca, and the remarkable morphology of forms and structures they grow in offer insight into the past, present, and future of the marine world.

With 

Suzanne Williams
Merit Researcher at the Natural History Museum 

Liz Harper
Professor of Evolutionary Malacology in the Department of Earth Sciences and Fellow at Gonville and Caius College, University of Cambridge 

Helen Scales
Marine biologist and Author. 

Producer: Martha Owen

Reading list:

S. Peter Dance, Shells (DK, 2022)

A.R. Irwin, S.T. Williams, D.I. Speiser and N.W. Roberts, ‘The marine gastropod Conomurex luhuanus (Strombidae) has high-resolution spatial vision and eyes with complex retinas’ (Journal of Experimental Biology 225:16, 2022)

Michael F. Land and Dan-Eric Nilsson, Animal Eyes (Oxford University Press, 2012) 

Andreia Salvador, Interesting Shells (The Natural History Museum, 2022)

Helen Scales, Shell Day: A Story of 24 Hours and 24 Molluscan Lives (University of Chicago Press, 2026)

Helen Scales, The Shell Spotter's Guide (National Trust Books, 2024)

Helen Scales, What a Shell Can Tell: Where They Live, What They Eat, How They Move, and More (Phaidon Press, 2022)

Helen Scales, Spirals in Time: The Secret Life and Curious Afterlife of Seashells (Bloomsbury Sigma, 2015)

Paul D. Taylor, Fossils: The Essential Guide (University of Chicago Press, 2025)

Suzanne Williams, ‘Molluscan shell colour’ (Biological Reviews, 2017) 

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.

Seashells

Melvyn Bragg and guests discuss the KT Boundary. Across the entire planet, where it hasn't been eroded or destroyed in land movements, there is a thin grey line. In Italy it is 1 cm thick, in America it stretches to three centimetres, but it is all the same thin grey line laid into the rock some 65 million years ago and it bears witness to a cataclysmic event experienced only once in Earth's history. It is called the KT Boundary and geologists believe it is the clue to the death of the dinosaurs and the ultimate reason why mammals and humans inherited the Earth.But exactly what did happen 65 million years ago? How was this extraordinary line created across the Earth and does it really hold the key to the death of the dinosaurs?With Simon Kelley, Head of Department in the Department of Earth Sciences, Open University, Jane Francis, Professor of Palaeoclimatology, University of Leeds; Mike Benton, Professor of Vertebrate Palaeontology in the Department of Earth Sciences, University of Bristol.

The KT Boundary

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