Andrew Dilnot analyses the numbers around debt.
1/5 Richard Burton and John Speke leave for Africa in search of the source of the Nile.
21/30 The discovery of radio waves in space, and how it led to the discovery of the pulsar.
Andrew Dilnot explores the statistics associated with social security.
Robin Ince listens back to some of the BBC archive of philosopher Bertrand Russell.
20/30 The Big Bang theory of how the universe began, and what its opponents think.
Andrew Dilnot charts the history of the British state through its numbers.
19/30 How did the discovery that the universe is expanding impact upon Einstein's theories?
Melvyn Bragg and his guests discuss Adam Smith's economic treatise The Wealth of Nations.
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