In Our Time22 Helmi 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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Jaksot(1092)

Joseph Roth

Misha Glenny and guests discuss one of the great writers on Central Europe after the first world war and on the dying of the old orders with the collapse of the Austro-Hungarian empire. As a German s...

4 Kesä 55min

Cybernetics

Misha Glenny and guests discuss cybernetics – the field of study which gave us the prefix ‘cyber’ and helped lay the foundations for the information age. After the Second World War, cybernetics emerge...

28 Touko 52min

Indian Indentured Labour

Misha Glenny and guests discuss how, after the abolition of slavery in the British Empire in 1833, sugar planters recruited workers from India to replace or compete with their formerly enslaved labour...

21 Touko 51min

M.C. Escher

Misha Glenny and guests discuss the work of Maurits Cornelis Escher (1898-1972), the graphic artist and printmaker best known for his impossible buildings, paradoxical perspectives, and repeating geom...

14 Touko 55min

Handel's Messiah

Misha Glenny and his guests discuss the most famous oratorio of George Frideric Handel (1685-1759) and his librettist Charles Jennens (1700-1773). For his libretto, Jennens drew from Old and New Test...

7 Touko 54min

The Spanish-American War 1898

Misha Glenny and guests discuss a turning point in world affairs in 1898 that left Spain greatly reduced as an imperial power and the US the owner of the Philippines, Guam and Puerto Rico, with a sign...

30 Huhti 55min

Silicon

Misha Glenny and guests discuss the physics, biology and chemistry of the element silicon which is at the heart of some of the most useful and beautiful objects on the planet. While it is still being...

23 Huhti 52min

Dadaism

Misha Glenny and guests discuss the provocative artistic phenomenon that first startled audiences in 1916 in Zurich. There, at the Cabaret Voltaire at the Holländische Meierei on the Spiegelgasse, Emm...

16 Huhti 50min