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Charles Darwin’s ideas changed our understanding of the world perhaps more than those of any other British scholar. His famous voyage on HMS Beagle ended in 1836, and he had developed his findings into his theories on evolution and natural selection within six years. It was not, however, until 1859 that he shared these revolutionary ideas with the public in On The Origin of Species, a book far different to the one he had intended to write.

In this episode of Opening Lines, John Yorke examines what finally led Darwin to write this pioneering work of popular science, and the impact it had upon his contemporaries.

The programme features evolutionary biologist Dr Tori Herridge of the University of Sheffield.

John has worked in television and radio for 30 years, and shares his experience with Radio 4 listeners as he unpacks the themes and impact of the books, plays and stories that are being dramatised in ÃÛÑ¿´«Ã½ Radio 4’s Sunday Drama series. As former Head of Channel Four Drama and Controller of ÃÛÑ¿´«Ã½ Drama Production he has worked on some of the most popular shows in Britain - from EastEnders to The Archers, Life on Mars to Shameless. As creator of the ÃÛÑ¿´«Ã½ Writers Academy he's trained a generation of screenwriters - now with over 70 green lights and thousands of hours of television to their names. He is the author of Into the Woods, the bestselling book on narrative, and he writes, teaches and consults on all forms of narrative, including many podcasts for Radio 4.

Clip of Andrew Marr from ‘Great Britons: Darwin’ ÃÛÑ¿´«Ã½2 (2002)

Sound: Sean Kerwin
Researcher: Henry Tydeman
Production Hub Coordinator: Nina Semple
Producer: Geoff Bird
Reader: Paul Dodgson
Executive Producer: Caroline Raphael

A Pier production for ÃÛÑ¿´«Ã½ Radio 4