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Farmers will have to do more for the environment to get farm subsidies.
BBC Radio 4
6/6 Michael Weltike tries to persuade Clare Balding of the benefits of barefoot walking.
Drinking water on Mars, big eyes in Neanderthals, cholera history and tapeworm genetics.
Nasa's Curiosity rover finds rock indicating that there may have been water on Mars.
BBC World Service Online
2/3 Erica McAlister asks if we should be eating more insects.
BBC Radio 4 FM
Friday 15 March 2013