As scientists around the world look for ways to combat COVID-19, the only human disease ever to be eradicated by vaccination could provide us with some insights.Since 1979 the world has been free from smallpox. But before the WHO’s concerted effort to eradicate the disease, it claimed millions of victims every year. It’s estimated that 300 million people died from it in the 20th century alone, and those who survived were often left with disfiguring scars or sometimes blind. Such was its destructive power, some commentators have argued that smallpox changed the course of human history, wiping out indigenous populations and allowing imperial nations to colonise new territories with little resistance. The English doctor Edward Jenner developed the first vaccine against smallpox in 1796. This procedure laid the foundations for immunisation programmes which have saved hundreds of millions of lives ever since, by giving people protection against a whole range of diseases - not just smallpox.Joining Bridget Kendall to discuss the history of smallpox are Professor Gareth Williams, author of Angel of Death: The Story of Smallpox; former head of the Centers for Disease Control and Prevention in the US, Dr Bill Foege who worked on the WHO smallpox eradication programme in Africa and India, and Dr Anne-Marie Moulin, author of The Vaccine Adventure.(Photo: Man with smallpox in the Middle East, 1898. Credit: Sepia Times/Universal Images Group/Getty Images)

There is a great deal of mystery surrounding the poems attributed to the female Kashmiri poet, mystic and sage known as Lal Ded or Lalla. There are no records of her life but what is beyond doubt is the vitality, wisdom and endurance of her work. Her poems, usually just four lines long, have been around for centuries and remain so popular that some of them have passed into everyday speech in Kashmir. Lal Ded’s poems are also celebrated for their independence of thought and spirit and for challenging stereotypical images of what counts as female poetry during the Middle Ages. Rajan Datar is joined by leading Kashmiri writer and translator Neerja Mattoo; poet Ranjit Hoskote, author of a complete rendering of Lalla's poetry into English; Andrew Schelling, professor of poetry at Naropa University in Colorado who has translated and edited Indian devotional poetry for many years; and Dean Accardi, professor of history at Connecticut College who specialises in medieval Kashmir.(Photo: a woman at sunset. Credit: rvimages/Getty Images)

The Great Pyramid of Giza in Egypt is one of the greatest wonders of the ancient world. It is the largest pyramid ever built and even today, with advanced satellite and thermal imaging and other high tech science, we don’t know everything about the pyramid- exactly what’s inside or how it was built. To explore the history of The Great Pyramid - also known as the Pyramid of Khufu, after the Pharaoh who commissioned it as his tomb - Rajan Datar is joined by Salima Ikram, Distinguished University Professor and Egyptology Unit Head at the American University in Cairo, space archaeologist Sarah Parcak, a National Geographic fellow and Professor at Birmingham University Alabama in the USA, and Professor Joyce Tyldesley, an archaeologist and Egyptologist from the University of Manchester in the UK.Photo: The Pyramids at Giza (Getty Images)

”People ask me to predict the future, when all I want to do is prevent it.” Ray Bradbury has been acclaimed as the writer most responsible for bringing modern science fiction into the literary mainstream but, as the quote above shows, he regarded himself as the author of modern philosophical fables, rather than a sci-fi writer. In his dystopian works, such as Fahrenheit 451, he holds up a mirror to contemporary society and then transposes it into fantastical and futuristic scenarios. Bradbury was a prolific writer who tried his hand at everything from poems and novels to TV and radio scripts but it’s his early short stories which he produced in his twenties that are perhaps the most imaginative.To mark the centenary of Bradbury’s birth, Rajan Datar is joined by three Bradbury experts to help him navigate through the author’s prodigious output: Professor Jonathan Eller from Indiana University who is also the Director of the Center for Ray Bradbury Studies; Dr. Miranda Corcoran who teaches American literature at University College Cork with particular interest in science fiction, horror and the gothic; and Dr. Phil Nichols who combines research into Bradbury's TV and other media work with the teaching of Film and Television Production at Wolverhampton University. (Photo: Ray Bradbury in Los Angeles, circa 1980. Credit Michael Montfort/Pix/Michael Ochs Archives/Getty Images)

In 476, the last of the Roman emperors in the West was deposed; in 1776, historian Edward Gibbon wrote “The History of the Decline and Fall of the Roman Empire”, and Rome’s fate became a major point of comparison for all empires. In Gibbon's view, instead of inquiring why the Roman empire was destroyed precisely 1300 years before, we should rather be surprised that it had subsisted so long. Ever since, there has been a fascination with what changed in Rome in 476 and why, and whether there were more significant changes earlier or later than that date and, importantly, what stayed the same.In this edition of The Forum, Rajan Datar explores the ideas about Rome’s Fall with Sarah E. Bond, Associate Professor of History at the University of Iowa, USA; Meaghan McEvoy, Lecturer in Byzantine Studies at Macquarie University in Sydney, Australia; and Peter Heather, Professor of Medieval History at King’s College London, UK.(Photo: Sack of Rome by the Visigoths led by Alaric I in 410. Coloured engraving. Credit: Prisma/Universal Images Group via Getty Images)

Pablo Picasso is commonly regarded as one of the most influential artists of the 20th Century, changing our way of seeing with his radical innovation and revolutionary approach. As pioneer of Cubism, godfather to the Surrealists, and creator of the enduring anti-war painting Guernica, he produced thousands of paintings in his lifetime, not to mention his sculptures, ceramics, stage designs, poetry and plays.Rajan Datar discusses his life and work with curators Ann Temkin and Katharina Beisiegel, and art historian Charlie Miller.(Photo: Pablo Picasso in 1955. Credit: Hulton Archive/Getty Images)

'War and Peace' by the Russian novelist Leo Tolstoy charts the story of Russia during the Napoleonic wars of the early 19th century, covering the pandemonium and brutality of the battlefield, as well as the equally intense dramas and loves of several families. It is a monumental novel, tracking the fortunes of dozens of brilliantly drawn individuals, with a cast of more than six hundred characters, both historical and fictional. So why is 'War and Peace' still such a compelling masterpiece, and why did Tolstoy later disown it?Joining Bridget Kendall are Dr Galina Alexeeva, head of Research at Yasnaya Polyana, Tolstoy’s former country estate in Russia; Andrei Zorin, Professor of Russian at Oxford University and author of a new biography of Tolstoy, and Professor Donna Orwin, author of 'Simply Tolstoy', who’s from the University of Toronto in Canada. (Image: Anthony Hopkins as Pierre Bezukhov in the 1972 BBC 20- part dramatization of Leo Tolstoy’s War and Peace. Credit: BBC Copyright pictures)

Geoffrey Chaucer has been called the father of English poetry and the greatest poet in English before Shakespeare. He is best known for The Canterbury Tales, stories told by a band of pilgrims on their way from London to the shrine of Thomas Becket who was murdered in Canterbury Cathedral two centuries before. Chaucer’s was an age of plague, war and revolt and his pilgrims bring insight into the life and values of those tumultuous times, from the bawdy Miller and the earthy Wife of Bath to the corrupt Pardoner and the Knight whose chivalry was increasingly out of step with the times. Bridget Kendall explores the range of Chaucer’s world with Emily Steiner, Professor of English at University of Pennsylvania; Mary Flannery, Professor of Medieval English Studies at Bern University; and Anthony Bale, Professor of Medieval Studies at Birkbeck College, University of London.(Image: Portrait of Geoffrey Chaucer based on a 19th century engraving by James Thomson Credit: Stock Montage/Getty Images)

Tango is easy to recognise: those daring steps, the tight hold of the dancing partners, the intense yet melancholy music dominated by the plaintive sounds of the bandoneon. But if you ask what exactly tango is and where it came from, the answer may not be so immediately clear – because it’s more than a genre of music, more than just a style of dance. To get insights into the roots, the culture and even the magic of tango, Rajan Datar is joined by leading tango historians Maria Susana Azzi, Christine Denniston and John Turci-Escobar.Photo: Argentine dancers on stage at the World Tango Championships in 2014 (Getty Images)

In Norse mythology, Valkyries were women who went out into battles to choose the slain warriors who deserved to be in Valhalla, Odin’s place in Asgard, to carry on fighting in preparation for the final apocalyptic confrontation of Ragnarok, between gods and giants. Fighters would see the Valkyries flying through the air or riding on horses, with shields and helmets, some saving the lives and ships of those they favoured, some causing death to those they disliked. These stories of Valkyries and Valhalla offer insights into the lives and values of the people who told them, with the possibility that human women went into battle too.Bridget Kendall is joined by Sif Rikhardsdottir, Professor and Chair of Comparative Literature at the University of Iceland, Marianne Hem Eriksen, Associate Professor of Archaeology at the Museum of Cultural History, University of Oslo in Norway, and Judith Jesch, Professor of Viking Studies at the University of Nottingham, in the UK.(Picture: Illustration from The Rhinegold and the Valkyrie, 1910. Artist: Arthur Rackham Credit: Historica Graphica Collection/Heritage Images/Getty Images)