In Our Time

Melvyn Bragg and guests discuss the physics of time. When writing the Principia Mathematica, Isaac Newton declared his hand on most of the big questions in physics. He outlined the nature of space, explained the motions of the planets and conceived the operation of gravity. He also laid down the law on time declaring: “Absolute, true, and mathematical time, of itself and from its own nature, flows...

Melvyn Bragg and guests discuss the history of scientific ideas about heat. As anyone who’s ever burnt their hand will testify – heat is a pretty commonplace concept. Cups of coffee cool down, microwaves reheat them, water boils at 100 degrees and freezes on cold winter nights. Behind the everyday experience of hot things lies a complex story of ideas spread across Paris, Manchester and particular...

Melvyn Bragg and guests discuss the Great Reform Act of 1832. The Act redrew the map of British politics in the wake of the Industrial Revolution and is a landmark in British political history.“We must get the suffrage, we must get votes, that we may send the men to Parliament who will do our work for us; …and we must have the country divided so that the little kings of the counties can't do as th...

Melvyn Bragg and guests examine the relationship between the mind and the brain as they discuss recent developments in Neuroscience. In the mid-19th century a doctor had a patient who had suffered a stroke. The patient was unable to speak save for one word. The word was ‘Tan’ which became his name. When Tan died, the doctor discovered damage to the left side of his brain and concluded that the abi...

Melvyn Bragg and guests discuss The Great Fire of London which destroyed up to a third of the city in 1666. Samuel Pepys described the scene in his diary:“all over the Thames, with one's face in the wind, you were almost burned with a shower of firedrops…and in corners and upon steeples, and between churches and houses, as far as we could see up the hill of the City, we saw the fire …It made me we...

Melvyn Bragg and guests discuss one of the most important works of political philosophy ever written - Aristotle’s ‘Politics’. Looking out across the city states of 4th century Greece Aristotle asked what made a society good and developed a language of ‘oligarchies’, ‘democracies’ and ‘monarchies’ that we still use today. Having witnessed his home town of Stagira destroyed by Philip of Macedon, Ar...

Melvyn Bragg and guests discuss the life and times of Simon Bolivar, hero of the revolutionary wars that liberated Spanish America from Spain. In 1804 Bolivar stood on a small hill in Rome and made a grand declaration. He said, “I swear before you, I swear before the God of my fathers, I swear by my fathers, I swear by my honour, I swear by my country that I will not rest, body or soul, until I ha...

Melvyn Bragg and guests discuss the culture of the Baroque. What do the music of Bach, the Colonnades of St Peter’s, the paintings of Caravaggio and the rebuilding of Prague have in common? The answer is the Baroque – a term used to describe a vast array of painting, music, architecture and sculpture from the 17th and 18th centuries. Baroque derives from the word for a misshapen pearl and denotes...

Melvyn Bragg and guests discuss Vitalism, an 18th and 19th century quest for the spark of life. On a dreary night in November 1818, a young doctor called Frankenstein completed an experiment and described it in his diary: “I collected the instruments of life around me, that I might infuse a spark of being into the lifeless thing that lay at my feet…By the glimmer of the half-extinguished light, I...

Melvyn Bragg and guests discuss an iconic piece of 20th century maths - Gödel’s Incompleteness Theorems. In 1900, in Paris, the International Congress of Mathematicians gathered in a mood of hope and fear. The edifice of maths was grand and ornate but its foundations, called axioms, had been shaken. They were deemed to be inconsistent and possibly paradoxical. At the conference, a young man called...

Melvyn Bragg and guests discuss one of the greatest intellectual projects in history - the mass translation of Greek ideas into Arabic from the 9th century onwards. One night in Baghdad, the 9th century Caliph Al-Mamun was visited by a dream. The philosopher Aristotle appeared to him, saying that the reason of the Greeks and the revelation of Islam were not opposed. On waking, the Caliph demanded...

Melvyn Bragg and guests discuss the parting of the Red Sea, the feeding of the five thousand and the general subject of miracles. Miracles have been part of human culture for thousands of years. From St Augustine in the 4th century through the medieval cult of saints to David Hume in the 18th, miracles have captured the imaginations of believers and sceptics alike. The way they have been celebrate...

Melvyn Bragg and guests discuss the Roman historian Tacitus who chronicled some of Rome’s most notorious emperors, including Nero and Caligula, and whose portrayal of Roman decadence influences the way we see Rome today. “The story I now commence is rich in vicissitudes, grim with warfare, torn by civil strife, a tale of horror even during times of peace”. So reads page one of The Histories by the...

Melvyn Bragg and guests discuss Dante’s ‘Inferno’ - a medieval journey through the nine circles of Hell. “Abandon hope, all ye who enter here”. This famous phrase is written above the gate of Hell in a 14th century poem by the Italian poet Dante Alighieri. The poem is called the ‘Divine Comedy’ and Hell is known as ‘Dante’s Inferno’. It is a lurid vision of the afterlife complete with severed head...

Melvyn Bragg and guests discuss the Arab conquests - an extraordinary period in the 7th and 8th centuries when the tribes of the Arabian Peninsula conquered the Middle East, Persia, North Africa and Southern Europe and spread the ideas of the Islamic religion. In 632 the prophet Muhammad died and left behind the nascent religion of Islam among a few tribes in the Arabian Desert. They were relative...

Melvyn Bragg and guests discuss the music of the spheres, the elegant and poetic idea that the revolution of the planets generates a celestial harmony of profound and transcendent beauty. In Shakespeare’s The Merchant of Venice the young Lorenzo woos his sweetheart with talk of the stars: “There’s not the smallest orb which thou behold’stBut in his motion like an angel sings,Still quiring to the y...

Melvyn Bragg and guests discuss the Metaphysical poets, a diffuse group of 17th century writers including John Donne, Andrew Marvell and George Herbert. Mourning the death of a good friend in 1631, the poet Thomas Carew declared: “The Muses' garden, with pedantic weeds O'erspread, was purg'd by thee; the lazy seeds Of servile imitation thrown away, And fresh invention planted.”The gardener in ques...

Melvyn Bragg and guests discusses the prescient thriller ‘The Riddle of the Sands’ about the decline Anglo-German relations before the First World War. In 1903 an Englishman called Charles Caruthers went sailing in the North Sea and stumbled upon a German military plot. The cunning plan was to invade the British Isles from the Frisian Islands using special barges. The plucky Caruthers foiled the p...

Melvyn Bragg and guests delve into the dark world of genetics under Joseph Stalin in discussing the career of Trofim Lysenko. In 1928, as America lurched towards the Wall Street Crash, Joseph Stalin revealed his master plan - nature was to be conquered by science, Russia to be made brutally, glitteringly modern and the world transformed by communist endeavour. Into the heart of this vision stepped...

Melvyn Bragg and guests discuss the strange mathematics of probability where heads or tails is a simple question with a far from simple answer. Gambling may be as old as the hills but probability as a mathematical discipline is a relative youngster. Probability is the field of maths relating to random events and, although commonplace now, the idea that you can pluck a piece of maths from the tumbl...

Melvyn Bragg and guests discuss how the Black Death influenced the structure and ideas of Medieval Europe. In October 1347, a Genoese trading ship arrived at the busy port of Messina in Sicily and docked among many similar ships doing similar things. But this ship was special because this ship had rats and the rats had fleas and the fleas had plague. This was the Black Death and its terrible progr...

Melvyn Bragg and guests discuss the Library at Nineveh, a treasure house of Assyrian ideas from the 7th Century BC. In 1849 a young English adventurer called Henry Layard started digging into a small hill on the banks of the River Tigris in Northern Iraq. Underneath it he found the ancient city of Nineveh. Layard unearthed extraordinary things - wonderful carved reliefs, ancient palace rooms and g...

Melvyn Bragg and guests discuss the history of ideas about the human brain. Since time immemorial people have puzzled over the brain and its functions. In the 5th century BC the Greek physician Hippocrates confidently asserted:“Men ought to know that from the brain and from the brain only arise our pleasures, joys, laughter and jests, as well as our sorrows, pains, grieves and tears.” This might s...

Melvyn Bragg and guests discuss the enclosure movement of the 18th and 19th centuries. In the early 19th century, the Northamptonshire poet John Clare took a good look at the countryside and didn’t like what he saw. He wrote: "Fence meeting fence in owners little boundsOf field and meadow, large as garden-grounds,In little parcels little minds to please,With men and flocks imprisoned, ill at ease....

Melvyn Bragg and guests discuss Materialism in Philosophy – the idea that matter and the interactions between matter account for all that exists and all that happens. We trace the descent of materialism from the ancient Greek philosophers Democritus and Epicurus, to its powerful and controversial flowering in the 17th, 18th and 19th centuries as an attack on religion. It’s provocative stuff even t...