LISTEN 
BBC Radio 4 joins the BBC World Service.
Adam Rutherford explores the deep history of sex
1/2 Frolicking fossils and suggestive theories - the origins and evolution of sex.
2/2 There may be only two sexes but nature has evolved many weird ways to make female and male
Wed 23 Jan 2013 21:00 BBC Radio 4
See all previous episodes from Sexual Nature: A Brief Natural History of Sex
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