5/5 Simon Schaffer tells of the astronomers who grappled with evolution long before Darwin.
2/5 Elizabeth must find a replacement for her increasingly unstable gardener.
Tom Holland and guests discuss Emperor Carausius, Henry II and Historians for Britain.
1/5 Elizabeth von Arnim details the joys and frustrations of creating a garden of her own.
Melvyn Bragg and guests discuss Frederick II, king of Prussia from 1740 to 1786.
4/5 Philip Ball tells how William Perkin brought purple to the people in Victorian London.
Soldiers vividly recall the terrible conditions they had to endure in Gallipoli in 1915.
Melvyn Bragg and guests discuss extremophiles and astrobiology.
Dan Snow, based in Gallipoli, hears the recollections of those who landed there in 1915.
3/5 The third man behind the unravelling of DNA's double helix Maurice Wilkins.
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