In Our Time: Science-Logo

Wissenschaft & Technik

In Our Time: Science

Scientific principles, theory, and the role of key figures in the advancement of science.

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Folgen von In Our Time: Science

293 Folgen
  • Folge vom 22.03.2001
    Fossils
    Melvyn Bragg and guests discuss the significance of fossils. In the middle of the nineteenth century the discoveries of the fossil hunters used to worry poor Ruskin to death, he wrote in a letter in 1851, “my faith, which was never strong, is being beaten to gold leaf…If only those Geologists would let me alone I could do very well, but those dreadful Hammers! I hear the clink of them at the end of every cadence of the Bible verses.”The testimony of fossils over the ages has been remarkably eloquent when we have wanted to listen; and now with mass spectrometers, electron microscopes and secondary X-ray detectors, these long dead organisms can speak to us of the past in ways they never could before.With Richard Corfield, Research Associate in the Department of Earth Sciences at Oxford University; Dianne Edwards, Distinguished Research Professor in Palaeobotany at Cardiff University; Richard Fortey, Senior Research Palaeontologist at the Natural History Museum.
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  • Folge vom 22.02.2001
    Quantum Gravity
    Melvyn Bragg examines Quantum Gravity. Early in the 20th century physicists were startled by the realisation that the smallest things in the universe do not obey Newton’s laws of gravity. Ripe apples fall from trees, billiard balls roll mostly on the table and the moon orbits the Earth in thrall to its gravitational pull, but there is no such force of gravity at work in the world of very small things. It seems there is one set of rules for the realm of every day objects, and a very different set of laws for the quantum world - where tiny particles actually form the building blocks of all those larger things.But how can this be? It doesn’t appear to make sense. Physicists decided that there must be another theory - a much larger theory - that unites, incorporates and finally makes sense of these divided realms. And this has been the Holy Grail of physics ever since. With Dr John Gribbin, Visiting Fellow in Astronomy, University of Sussex; Lee Smolin, Professor of Physics, Centre for Gravitational Physics and Geometry, Pennsylvania State University and Visiting Professor of Physics at Imperial College, London; Dr Janna Levin, Advanced Fellow, Department of Applied Mathematics and Theoretical Physics, Cambridge University.
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  • Folge vom 01.02.2001
    Imperial Science
    Melvyn Bragg and guests discuss what drove the British Empire, especially in Victoria’s century. Was it science, more specifically, the science of plants, of agriculture, a scientific notion of nature and the improvement of nature? Was this seemingly rather adjacent notion - that the source of Empire can be found in Kew Gardens, Royal, Botanical, rather than in the muzzle of a gun or in the purse of a plunderer or in the consciousness of a conqueror - was science “the force that was with us?” Francis Bacon said of the Irish in 1603, “We shall reclaim them from their barbarous manners…populate plant and make civil all the provinces of that kingdom ..as we are persuaded that it is one of the chief causes for which God hath brought us to the Imperial Crown of these Kingdoms”. Centuries later, at the height of the Empire, John Stuart Mill wrote in On Liberty: “Despotism is a legitimate mode of government in dealing with barbarians, provided the end be their improvement”. But - despotism aside - was this notion of ‘improvement’ really the driving force behind the Empire? And did the British Empire have any firm basis in believing that the ‘light of pure reason’ that it brought to its colonies was any brighter than the knowledge that existed before they came? With Richard Drayton, Professor of History at the University of Virginia and author of Nature’s Government: Science, Imperial Britain and the ‘Improvement’ of the World; Maria Misra, Lecturer in Modern History and fellow of Keble College Oxford; Ziauddin Sardar, Professor of Science and Technology Policy, Middlesex University.
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  • Folge vom 11.01.2001
    Mathematics and Platonism
    Melvyn Bragg looks at the deep claims made for mathematics, the discipline some believe to be the soul and true key to the understanding of all life, from the petals on the sunflower to the pulse in our wrists. The notion that mathematics is akin to theology might take some taking in at first. But from the first, in the West, they were. To Pythagoras, numbers were mystical and “prove” God. To Plato, who, it is claimed, has driven mathematics for over two thousand years, the ideals beyond the reality of our lives are to be found in mathematical perfections, immutable truth, God again in numbers. Are mathematics there in the universe, waiting to be discovered as the great ocean lying before Newton - or are they constructs applied by us to the universe and imposed rather than uncovered? It’s a long way from chalky sums on the blackboard and the first careless swing of the compass. Galilei Galileo wrote, “The Universe cannot be read until we have learnt the language and become familiar with the characters in which it was written. It is written in mathematical language, and the letters are triangles, circles and other geometrical figures, without which means it is humanly impossible to comprehend a single word”. But is he right that mathematics is the script in which the universe was written, or is it really just one of many possible systems that humankind has invented to interpret our world? Is mathematics is a process of invention or a voyage of discovery?With Ian Stewart, Professor of Mathematics and Gresham Professor of Geometry, University of Warwick; Margaret Wertheim, science writer, journalist and author of Pythagoras’ Trousers; John D Barrow, Professor of Applied Mathematics and Theoretical Physics, University of Cambridge.
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