The beginnings of understanding autism go back to the 19th century, and they were worked out by a man who married his cousin and had ten children with her.
He also came up with the theory of evolution by natural selection, and so invented biology.
Charles Darwin was born 200 years ago next month, and we hear about his life and work with geneticist and writer Steve Jones.
Steve JonesProfessor of Genetics, University College London
Title: Darwin's Island: The Galapagos in the Garden of England Author: Steve Jones Publisher: Little Brown
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