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1/20 David Attenborough talks about filming in one of nature's most inaccessible places. (R)
BBC Radio 4
Life’s many paths to being female or male: in humans, komodo dragons and transexual fish
BBC World Service Online
Charlotte Smith visits a 'nature friendly' farm run by the Worcestershire Wildlife Trust. (R)
Jim Al-Khalili talks to Alan Watson about his quest to discover the source of cosmic rays.
UK landfills are full. Should we create energy from our waste? Tom Heap investigates.
Adam Walton considers the mysteries of digestion with a panel of experts.
BBC Radio Wales
Seoul hackers rescuing the good name of hacker culture
2/5 Writer Christopher Hope discusses the cold winds of Languedoc.
BBC Radio 3
Wednesday 20 February 2013