What is the truth behind the mermaid story? Janet Ellis investigates.
4/5 David Livingstone aims to solve the mystery of the Nile's source once and for all.
4/5 As Mary's father emerges from his grief, how will his new romance affect the family?
24/30 What we can see is only a fraction of matter in the cosmos. Heather looks at dark matter.
Sean Curran reports from Westminster.
Melvyn Bragg and his guests discuss the history and significance of eunuchs.
Adam Rutherford examines a significant step towards the intelligent computer.
The science, psychology and management of queuing. Evan Davis chairs a discussion.
Would the system of lay magistrates be invented today? Presented by Joshua Rozenberg.
Michael Arditti reviews Ralph Fiennes in George Bernard Shaw's Man and Superman.
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